Quantum entanglement is a key resource, which grants quantum systems the ability to accomplish tasks that are classically impossible. Here, we apply Feynman's sum-over-histories formalism to interacting bipartite quantum systems and introduce entanglement measures for bipartite quantum histories. Based on the Schmidt decomposition of the matrix comprised of the Feynman propagator complex coefficients, we prove that bipartite quantum histories are entangled if and only if the Schmidt rank of this matrix is larger than 1. The proposed approach highlights (...) the utility of using a separable basis for constructing the bipartite quantum histories and allows for quantification of their entanglement from the complete set of experimentally measured sequential weak values. We then illustrate the nonclassical nature of entangled histories with the use of Hardy's overlapping interferometers and explain why local hidden variable theories are unable to correctly reproduce all observable quantum outcomes. Our theoretical results elucidate how the composite tensor product structure of multipartite quantum systems is naturally extended across time and clarify the difference between quantum histories viewed as projection operators in the history Hilbert space and those viewed as chain operators and propagators in the standard Hilbert space. (shrink)

Rob Clifton was one of the most brilliant and productive researchers in the foundations and philosophy of quantum theory, who died tragically at the age of 38. Jeremy Butterfield and Hans Halvorson collect fourteen of his finest papers here, drawn from the latter part of his career (1995-2002), all of which combine exciting philosophical discussion with rigorous mathematical results. Many of these papers break wholly new ground, either conceptually or technically. Others resolve a vague controversy intoa precise technical problem, which (...) is then solved; still others solve an open problem that had been in the air for soem time. All of them show scientific and philosophical creativity of a high order, genuinely among the very best work in the field. The papers are grouped into four Parts. First come four papers about the modal interpretation of quantum mechanics. Part II comprises three papers on the foundations of algebraic quantum field theory, with an emphasis on entanglement and nonlocality. The two papers in Part III concern the concept of a particle in relativistic quantum theories. One paper analyses localization; the other analyses the Unruh effect (Rindler quanta) using the algebraic approach to quantum theory. Finally, Part IV contains striking new results about such central issues as complementarity, Bohr's reply to the EPR argument, and no hidden variables theorems; and ends with a philosophical survey of the field of quantum information. The volume includes a full bibliography of Clifton's publications. Quantum Entanglements offers inspiration and substantial reward to graduates and professionals in the foundations of physics, with a background in philosophy, physics, or mathematics. (shrink)

David Lewis is a natural target for those who believe that findings in quantum physics threaten the tenability of traditional metaphysical reductionism. Such philosophers point to allegedly holistic entities they take both to be the subjects of some claims of quantum mechanics and to be incompatible with Lewisian metaphysics. According to one popular argument, the non-separability argument from quantum entanglement, any realist interpretation of quantum theory is straightforwardly inconsistent with the reductive conviction that the complete physical state of the (...) world supervenes on the intrinsic properties of and spatio-temporal relations between its point-sized constituents. Here I defend Lewis's metaphysical doctrine, and traditional reductionism more generally, against this alleged threat from quantum holism. After presenting the non-separability argument from entanglement, I show that Bohmian mechanics, an interpretation of quantum mechanics explicitly recognized as a realist one by proponents of the non-separability argument, plausibly rejects a key premise of that argument. Another holistic worry for Humeanism persists, however, the trouble being the apparently holistic character of the Bohmian pilot wave. I present a Humean strategy for addressing the holistic threat from the pilot wave by drawing on resources from the Humean best system account of laws. (shrink)

Quantum mechanical entangled configurations of particles that do not satisfy Bell’s inequalities, or equivalently, do not have a joint probability distribution, are familiar in the foundational literature of quantum mechanics. Nonexistence of a joint probability measure for the correlations predicted by quantum mechanics is itself equivalent to the nonexistence of local hidden variables that account for the correlations (for a proof of this equivalence, see Suppes and Zanotti, 1981). From a philosophical standpoint it is natural to ask what sort of (...) concept can be used to provide a “joint” analysis of such quantum correlations. In other areas of application of probability, similar but different problems arise. A typical example is the introduction of upper and lower probabilities in the theory of belief. A person may feel uncomfortable assigning a precise probability to the occurrence of rain tomorrow, but feel comfortable saying the probability should be greater than ½ and less than ⅞. Rather extensive statistical developments have occurred for this framework. A thorough treatment can be found in Walley (1991) and an earlier measurement-oriented development in Suppes (1974). It is important to note that this focus on beliefs, or related Bayesian ideas, is not concerned, as we are here, with the nonexistence of joint probability distributions. Yet earlier work with no relation to quantum mechanics, but focused on conditions for existence has been published by many people. For some of our own work on this topic, see Suppes and Zanotti (1989). Still, this earlier work naturally suggested the question of whether or not upper and lower measures could be used in quantum mechanics, as a generalization of.. (shrink)

This volume gathers together ground-breaking work on the foundations and philosophy of quantum physics, by one of the most brilliant and productive researchers in the field. Rob Clifton died tragically in 2002 at the age of 38; two of his colleagues, themselves leading philosophers of physics, present fourteen of his finest papers here, all of which combine exciting philosophical discussion with rigorous mathematical results. Quantum Entanglements offers inspiration and substantial reward to anyone working on the foundations of quantum theory, with (...) backgrounds in philosophy, physics, or mathematics. (shrink)

This paper argues for a metaphysics of relations based on a characterization of quantum entanglement in terms of non-separability, thereby regarding entanglement as a sort of holism. By contrast to a radical metaphysics of relations, the position set out in this paper recognizes things that stand in the relations, but claims that, as far as the relations are concerned, there is no need for these things to have qualitative intrinsic properties underlying the relations. This position thus opposes a (...) metaphysics of individual things that are characterized by intrinsic properties. A principal problem of the latter position is that it seems that we cannot gain any knowledge of these properties insofar as they are intrinsic. Against this background, the rationale behind a metaphysics of relations is to avoid a gap between epistemology and metaphysics. (shrink)

Entanglement has long been the subject of discussion by philosophers of quantum theory, and has recently come to play an essential role for physicists in their development of quantum information theory. In this paper we show how the formalism of algebraic quantum field theory (AQFT) provides a rigorous framework within which to analyse entanglement in the context of a fully relativistic formulation of quantum theory. What emerges from the analysis are new practical and theoretical limitations on an experimenter's (...) ability to perform operations on a field in one spacetime region that can disentangle its state from the state of the field in other spacelike-separated regions. These limitations show just how deeply entrenched entanglement is in relativistic quantum field theory, and yield a fresh perspective on the ways in which the theory differs conceptually from both standard non-relativistic quantum theory and classical relativistic field theory. (shrink)

Initially Einstein, Podolsky, and Rosen (EPR) and later Bell shed light on the non-local properties exhibited by subsystems in quantum mechanics. Separately, Kochen and Specker analyzed sets of measurements of compatible observables and found that a consistent coexistence of these results is impossible, i.e., quantum indefiniteness of measurement results. As a consequence, quantum contextuality, a more general concept compared to non-locality, leads to striking phenomena predicted by quantum theory. Here, we report neutron interferometric experiments which investigate entangled states in a (...) single-particle system: entanglement is, in this case, achieved not between particles, but between degrees of freedom i.e., between spin, path, and energy degrees of freedom. Appropriate combinations of the spin analysis and the position of the phase shifter in the interferometer allow an experimental verification of the violation of a Bell-like inequality. In addition, state tomography, tomographic analysis of the density matrix of a quantum system, and Kochen-Specker-like phenomena are presented to characterize neutrons’ entangled states and their peculiarity. Furthermore, a coherent energy manipulation scheme is accomplished with a radio-frequency (RF) spin-flipper. This scheme allows the (total) energy degree of freedom to be entangled: the remarkable behavior of a triply entangled GHZ-like state is demonstrated. (shrink)

Quantum mechanics tells us that states involving indistinguishable fermions must be antisymmetrized. This is often taken to mean that indistinguishable fermions are always entangled. We consider several notions of entanglement and argue that on the best of them, indistinguishable fermions are not always entangled. We also present a simple but unconventional way of representing fermionic states that allows us to maintain a link between entanglement and non-factorizability.

This paper surveys some of the questions that arise when we consider how entanglement and relativity are related via the notion of non-locality. We begin by reviewing the role of entangled states in Bell inequality violation and question whether the associated notions of non-locality lead to problems with relativity. The use of entanglement and wavefunction collapse in Einstein's famous incompleteness argument is then considered, before we go on to see how the issue of non-locality is transformed if one (...) considers quantum mechanics without collapse to be a complete theory, as in the Everett interpretation. (shrink)

We explore the entanglement of the vacuum of a relativistic field by letting a pair of causally disconnected probes interact with the field. We find that, even when the probes are initially non-entangled, they can wind up to a final entangled state. This shows that entanglement persists between disconnected regions in the vacuum. However the probe entanglement, unlike correlations, vanishes once the regions become sufficiently separated. The relation between entropy, correlations and entanglement is discussed.

This paper develops and explores the idea of moral entanglements: the ways in which, through innocent transactions with others, we can unintendedly accrue special obligations to them. More particularly, the paper explains intimacy-based moral entanglements, to which we become liable by accepting another's waiver of privacy rights. Sometimes, having entered into others' private affairs for innocent or even helpful reasons, one discovers needs of theirs that then become the focus of special duties of care. The general duty to warn them (...) of their need cannot directly account for the full extent of these duties, but does indicate why a silent retreat is impermissible. The special duties of care importantly rest on a transfer of responsibilities that accompanies the privacy waivers. The result is a special obligation of beneficence that, while grounded in a voluntary transaction, was never voluntarily undertaken. Impartialist views of beneficence cannot capture the relevant phenomena well. (shrink)

Ecological Entanglement in the Anthropocene brings together academics, activists, and artists to explore how human and nonhuman worlds act upon and transform one another. This book examines how numerous local practices can productively gesture to actions that exceed the current predictions of impending ecological destruction, with a particular focus upon agriculture, indigeneity and aesthetics.

Focused on the material practices of making insect specimens, I explore how shifting concepts of potential are intricately crafted on the lab bench. Different types of time—from personal histories to imagined futures—are created and entangled as butterflies are made into specimens. Transforming a butterfly into a scientific tool does not merely transform the butterfly, I suggest, but also reciprocally folds back to transform the scientist who makes it. Based on ethnographic fieldwork with scientists in the labs and workrooms at the (...) Smithsonian National Museum of Natural History in Washington, DC and the California Academy of Sciences in San Francisco, California, I follow butterflies and moths (Lepidoptera) as they are collected, euthanized, pinned, genetically sampled for rewilding projects, such as reviving a Californian sand dune ecology, and frozen in biobanks for as-yet-unknown future uses. Through a comparative study of practices at these two sites, I examine how a butterfly can contain multiple types of potential: manifesting its inherent potential as it transforms from caterpillar to butterfly, the plasticity of the butterfly body as it is crafted into a scientific specimen, and the potential of that specimen to be used as a site for extracting genomic data. Perceptions of time, salvation, loss, and care emerge as specimens are prepared, sampled, and reimagined as solutions for recreating lost ecologies. (shrink)

This paper deals with an (otherwise classical) two-(non-interacting) particle system immersed in a common stochastic zero-point radiation field. The treatment is an extension of the one-particle case for which it has been shown that the quantum properties of the particle emerge from its interaction with the background field under stationary and ergodic conditions. In the present case we show that non-classical correlations—describable only in terms of entanglement—arise between the (nearby) particles whenever both of them resonate to a common frequency (...) of the field. For identical particles the entanglement becomes maximum and must be described by totally (anti)symmetric states. (shrink)

While entanglement is a phenomenon discussed in quantum theory, it can also be found in art. We propose to connect entanglement to art’s most fundamental question: what is creativity? For example, Marcel Duchamp found the essence of the creative act in the “art coefficient,” the difference and/or gap between the artist’s intention and realization which is created. This paper locates the common sense understanding of entanglement in an inseparable whole that ensures difference between the intention and realization. (...) Seeing the artistic act as actively designing entanglement within artistic production, we present examples of this from the work of the Japanese-style painter Nakamura, and present a concrete vision for an answer regarding the question of the nature of creativity. (shrink)

The fact that social welfare professions including social work, youth work and community work deal with the lives and relationships of human beings is far from controversial. What is contentious is that in light of increasing intellectual work on the nature of social practices there is a failure in the human services literature to adequately examine the interdependencies and entanglements between conceptualisations of the stuff that the helping professions deals with and understandings of practice. This article examines the nexus and (...) mediations between the phenomena and practice of social service work. The case is made that human services and the human beings they deal with are often imagined and represented in one-dimensional, unambiguous, calculable and orderable ways that align with neo-liberal inspired and technical approaches to practice. I argue that these accounts are inadequate and I suggest that practices of care and the people engaged in such practices should be constituted as complex, unpredictable, wicked and emergent. A key to good practice in the people professions is acknowledging and attending to this complexity and aporia. (shrink)

ABSTRACT Dance and music serve in this essay to exemplify both the looping entanglement of art and life as well as the account of art and philosophy developed in Strange Tools. This essay replies to criticisms of Carrie Noland, Nancy S. Struever, and Thomas Rickert and also offers a briefer restatement of the general approach.

The limitation on the sharing of entanglement is a basic feature of quantum theory. For example, if two qubits are completely entangled with each other, neither of them can be at all entangled with any other object. In this paper we show, at least for a certain standard definition of entanglement, that this feature is lost when one replaces the usual complex vector space of quantum states with a real vector space. Moreover, the difference between the two theories (...) is extreme: in the real-vector-space theory, there exist states of arbitrarily many binary objects, “rebits,” in which every rebit in the system is maximally entangled with each of the other rebits. (shrink)

This book brings together anthropological studies of human-animal relations among Indigenous Peoples in three regions of the Americas: the Andes, Amazonia and the American Arctic. Through ethnographic essays, the authors illustrate and compare entanglements of human and other-than-human lives.

Law is usually understood as an orderly, coherent system, but this volume shows that it is often better understood as an entangled web. Bringing together eminent contributors from law, political science, sociology, anthropology, history and political theory, it also suggests that entanglement has been characteristic of law for much of its history. The book shifts the focus to the ways in which actors create connections and distance between different legalities in domestic, transnational and international law. It examines a wide (...) range of issue areas, from the relationship of state and indigenous orders to the regulation of global financial markets, from corporate social responsibility to struggles over human rights. The book uses these empirical insights to inform new theoretical approaches to law, and by placing the entanglements between norms from different origins at the centre of the study of law, it opens up new avenues for future legal research. This title is also available as Open Access. (shrink)

Vicarious responsibility is sometimes analysed by considering the different kinds of agents involved—who is vicariously responsible for the actions of whom? In this paper, I discuss vicarious responsibility from a different angle: in what sense is the vicarious agent responsible? I do this by considering the ways in which one may take responsibility for events caused by another agent or process. I discuss three senses of taking responsibility—accepting fault, assuming obligations, and fulfilling obligations—and the forms of vicarious responsibility that correspond (...) to these. I end by explaining how to judge which sense applies in a given case, based on the degree of (what I call) moral entanglement between the agent and what they should take responsibility for. (shrink)

"In Entangled Empathy, scholar and activist Lori Gruen argues that rather than focusing on animal rights, we ought to work to make our relationships with animals right by empathetically responding to their needs, interests, desires, vulnerabilities, hopes, and unique perspectives. Pointing out that we are already entangled in complex and life-altering relationships with other animals, Gruen guides readers through a new way of thinking about and practicing animal ethics. Lori Gruen is Professor of Philosophy and Coordinator of Wesleyan Animal Studies (...) at Wesleyan University. She is the author of Ethics and Animals and co-editor, with Carol Adams, of Ecofeminism: Feminist Intersections with Animals and the Earth."--Back cover. (shrink)

A 2015 experiment by Hanson and Delft colleagues provided further confirmation that the quantum world violates the Bell inequalities, being the first Bell test to close two known experimental loopholes simultaneously. The experiment was also taken to provide new evidence of ‘spooky action at a distance’. Here we argue for caution about the latter claim. The Delft experiment relies on entanglement swapping, and our main claim is that this geometry introduces an additional loophole in the argument from violation of (...) the Bell inequalities to action at a distance: the apparent action at a distance may be an artifact of ‘collider bias’. In the absence of retrocausality, the sensitivity of such experiments to this ‘Collider Loophole’ depends on the temporal relation between the entanglement swapping measurement C and the two measurements A and B between which we seek to infer a causal connection. CL looms large if the C is in the future of A and B, but not if C is in the past. The Delft experiment itself is the intermediate case, in which the separation is spacelike. We argue that this leaves it vulnerable to CL, unable to establish conclusively that it avoids it. (shrink)

Two quantum Macro-states and their Macroscopic Quantum Superpositions (MQS) localized in two far apart, space-like separated sites can be non-locally correlated by any entangled couple of single-particles having interacted in the past. This novel “Macro-Macro” paradigm is investigated on the basis of a recent study on an entangled Micro-Macro system involving N≈105 particles. Crucial experimental issues as the violation of Bell’s inequalities by the Macro-Macro system are considered.

In The Entanglement, philosopher Alva Noë explores the inseparability of life, art, and philosophy, and argues that we have radically underestimated the significance of this long recognized but underappreciated reality, what he refers to as the "entanglement." The core of The Entanglement is the idea that human existence is inextricably aesthetic and philosophical. In the first half of the book, Noë offers a detailed examination of pictures and seeing, writing and speech, and choreography and dancing, which serve (...) as case studies and the base in which the phenomenon of entanglement is set. In later chapters, Noë deepens this analysis by exploring the nature of the aesthetic itself, and its place in our lives, examining what the entanglement can teach us about science, and, in particular, the project of applying science in the domain of the human. In these later chapters he covers a range of topics, including sex, gender, and the body, psychology and AI, the problem of style, and the nature of 'nature.' Drawing on his work in perception, consciousness, and the philosophy of art, Noë offers a new model for thinking about the nature of the human, the limits to what a natural science of the human can do on its own, and the irreplaceable importance of art and philosophy for the larger project of studying and understanding ourselves. (shrink)

We consider the concept of entanglement for pure cases of finite dimensional state spaces. The criterion of unentangled states is related to demanding rank one of an associated eigenvalue problem. In addition to the conventional procedure based on the Schmidt decomposition, we devise a method based on the spectral resolution of unsymmetric matrices. In particular, we consider the case when all eigenvalues are zero, and find that the method still works.

Squashed entanglement :829–840, 2004) is a monogamous entanglement measure, which implies that highly extendible states have small value of the squashed entanglement. Here, invoking a recent inequality for the quantum conditional mutual information :575–611, 2015) greatly extended and simplified in various work since, we show the converse, that a small value of squashed entanglement implies that the state is close to a highly extendible state. As a corollary, we establish an alternative proof of the faithfulness of (...) squashed entanglement. We briefly discuss the previous and subsequent history of the Fawzi–Renner bound and related conjectures, and close by advertising a potentially far-reaching generalization to universal and functorial recovery maps for the monotonicity of the relative entropy. (shrink)

Entangled states are a specific feature of quantum physics that neither have a counterpart in classical physics nor in the realm of our ordinary experiences. In this chapter we outline the debate about these particular states both historically and systematically. We delineate how the debate originated in an argument for the incompleteness of quantum mechanics by Einstein, Podolsky and Rosen, and we show why, on the one hand, the argument is not considered convincing today, on the other hand, however, still (...) affects present discussions. In a second part we give a systematic overview over the contemporary debate on entanglement which focusses on Bell’s theorem and its consequences. Discerning different levels, we reconstruct the theorem and its premises in a clear way and discuss possible consequences. We analyze in detail the received view that Bell’s theorem implies non-locality and relate it to concepts such as “non-separability‘ and “holism‘. Especially we examine the question whether the phenomena involving entangled systems can be explained causally and whether the central conflict between a non-locality and the theory of relativity can be solved. (shrink)

First philosophy: reality, truth, and knowledge -- The universe in brief -- Ontology -- Theory of truth -- Epistemology -- Axiology: goodness, beauty, and liberty -- Values as situations -- Ethics -- Aesthetics -- Political philosophy.

In the literature there has been evidence that a kind of relational structure called a quantum Kripke frame captures the essential characteristics of the orthogonality relation between pure states of quantum systems, and thus is a good qualitative mathematical model of quantum systems. This paper adds another piece of evidence by providing a tensor-product construction of two finite-dimensional quantum Kripke frames. We prove that this construction is exactly the qualitative counterpart of the tensor-product construction of two finite-dimensional Hilbert spaces over (...) the complex numbers, and thus show that composition of quantum systems, especially the phenomenon of quantum entanglement, can be modelled in the framework of quantum Kripke frames. The assumptions used in our construction hint that we need complex numbers in quantum theory. Moreover, for this construction, we give a new and interesting characterization of linear maps of trace 0 in terms of the orthogonality relation. (shrink)

Quantum entanglement poses a challenge to the traditional metaphysical view that an extrinsic property of an object is determined by its intrinsic properties. So structural realists might be tempted to cite quantum entanglement as evidence for structural realism. I argue, however, that quantum entanglement undermines structural realism. If we classify two entangled electrons as a single system, we can say that their spin properties are intrinsic properties of the system, and that we can have knowledge about these (...) intrinsic properties. Specifically, we can know that the parts of the system are entangled and spatially separated from each other. In addition, the concept of supervenience neither illuminates quantum entanglement nor helps structural realism. (shrink)

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Based on an experiential dream series this consciousness study shapes a theory that the fragmentary nature of dreams seeks wholeness deriving from the Collective Unconscious. As dreams evolve from a microscopic-personal worldview to a macroscopic-transpersonal dimension, concern for survival of self is augmented with concern for survival of the species. Entangled dream imagery provides cues to quantum functions actualized through the tutelage of departed scientific luminaries. The intentionality, specificity, and information input (...) experienced in the communications imply that the collective unconscious and quantum cognition are an integrated structure revealing an underlying methodology. (shrink)

In this paper recent work that attempts to link quantum entanglement to (i) thermodynamic energy, (ii) thermodynamic entropy and (iii) information is reviewed. With respect to the first two links the paper is essentially expository. The final link is elaborated on: it is argued that the value of the entanglement of a bipartite system in a pure state is equal to the value of the irreducible uncertainty (i.e. irreducibly missing information) about its subsystems and that this suggests that (...) entanglement gives rise to irreducible uncertainty. (The exact meaning of the phrase “irreducible uncertainty”, as used here, is explained in the body of the paper. Roughly speaking, it is the uncertainty about the post-measurement state of a system that cannot be removed at the pre-measurement stage.) This analysis is used to make a further connection between entanglement and statistical mechanical entropy: it is argued that these properties are indirectly linked, in so far as both give rise to forms of uncertainty (albeit rather different forms of uncertainty about rather different things). (shrink)

In this edited volume, authors from multiple academic and creative disciplines interrogate constructionist and new materialist paradigms to assess their adequacy when analysing entanglements and weavings of gender and love in diverse contexts where discursive and material elements intra-act.

We argue that in implanted neurotechnology research, participants and researchers experience what Henry Richardson has called “moral entanglement.” Participants partially entrust researchers with access to their brains and thus to information that would otherwise be private, leading to created intimacies and special obligations of beneficence for researchers and research funding agencies. One of these obligations, we argue, is about continued access to beneficial technology once a trial ends. We make the case for moral entanglement in this context through (...) exploration of participants’ vulnerability, uncompensated risks and burdens, depth of relationship with the research team, and dependence on researchers in implanted neurotechnology trials. (shrink)

Potentiality, Entanglement and Passion-at-a-Distance is a book for theoretical physicists and philosophers of modern physics. It treats a puzzling and provocative aspect of recent quantum physics: the apparent interaction of certain physical events that cannot share any causal connection. These are said to be `entangled' in some way, but an explanation remains elusive. Abner Shimony - to whom the book is dedicated - and others suggest the need to revive the category of what may be seen as a metaphysical (...) potentiality. Abner has described these events without actions to link them as `passion at a distance': not active, but passive. The discussions gathered here are written by a truly remarkable cast of scientists and philosophers and shed new light on the most profound puzzles of our times. (shrink)

The characteristic holistic features of the quantum theoretic formalism and the intriguing notion of entanglement can be applied to a field that is far from microphysics: logical semantics. Quantum computational logics are new forms of quantum logic that have been suggested by the theory of quantum logical gates in quantum computation. In the standard semantics of these logics, sentences denote quantum information quantities: systems of qubits (quregisters) or, more generally, mixtures of quregisters (qumixes), while logical connectives are interpreted as (...) special quantum logical gates (which have a characteristic reversible and dynamic behavior). In this framework, states of knowledge may be entangled, in such a way that our information about the whole determines our information about the parts; and the procedure cannot be, generally, inverted. In spite of its appealing properties, the standard version of the quantum computational semantics is strongly “Hilbert-space dependent”. This certainly represents a shortcoming for all applications, where real and complex numbers do not generally play any significant role (as happens, for instance, in the case of natural and of artistic languages). We propose an abstract version of quantum computational semantics, where abstract qumixes, quregisters and registers are identified with some special objects (not necessarily living in a Hilbert space), while gates are reversible functions that transform qumixes into qumixes. In this framework, one can give an abstract definition of the notions of superposition and of entangled pieces of information, quite independently of any numerical values. We investigate three different forms of abstract holistic quantum computational logic. (shrink)

This article discusses the peculiar features of quantum entanglement and quantum non-locality within the algebraic approach to relativistic quantum field theory (RQFT). The debate on the ontology of RQFT is considered in the light of these well-known but little discussed features. In particular, this article examines the ontic structural realist understanding of quantum entanglement and quantum non-locality and its contribution to this debate.

A fruitful direction for research on the European cultural heritage is to adopt a transnational approach. Rather than see cultural heritage as predominantly expressed in national contexts, it could be seen as primarily transnational and as plural. Such a view would also suggest a conception of national histories as themselves products of transnational encounters. In this perspective, the European dimension is not then necessarily something over and above nations, but part of their heritage. Moreover, as fundamentally transnational, the European heritage (...) is not exclusively confined to Europe. Cultural heritage is not something that is fixed or based on an essence; it is produced and reinterpreted by social actors in different but overlapping contexts. This is also an interpretative approach that draws attention to the entangled nature of memories and especially the cultural logic by which new conceptions and narratives of heritage emerge from the encounter and entanglement of different memories. Such an approach offers new opportunities for comparative research on the European heritage as an entangled mosaic of histories and memories. This approach thus rejects not only particularistic but also universalistic ones such as alternative Eurocentric accounts. (shrink)

This chapter contains sections titled: Subjection and Autonomy: Foucault contra Habermas What Is Fallacious About the Genetic Fallacy? Conclusion References.

Modernity is better defined as a time orientation, instead of as a set of institutions, which usually smuggles in some provincial or other aprioristic assumptions. A time conception of modernity also gives a precise meaning to postmodernity. Modernity in this non-Eurocentric sense, entails several different, competing master narratives, different social forces of, and conflicts between, modernity and anti-modernity, and different cultural contextualizations of the past-future contrast. But these different varieties do not simply coexist and challenge each other, they are entangled (...) with each other in various ways. Starting from observing how different time warps were interwoven in vanguard modernist art, an analytical framework for grasping, understanding, and explaining the entanglement of modernities is spelled out. (shrink)

Recent work in cognitive and computational neuroscience depicts the human cortex as a multi-level prediction engine. This ‘predictive processing’ framework shows great promise as a means of both understanding and integrating the core information processing strategies underlying perception, reasoning, and action. But how, if at all, do emotions and sub-cortical contributions fit into this emerging picture? The fit, we shall argue, is both profound and potentially transformative. In the picture we develop, online cognitive function cannot be assigned to either the (...) cortical or the sub-cortical component, but instead emerges from their tight co-ordination. This tight co-ordination involves processes of continuous reciprocal causation that weave together bodily information and ‘top-down’ predictions, generating a unified sense of what’s out there and why it matters. The upshot is a more truly ‘embodied’ vision of the predictive brain in action. (shrink)

Entanglement was initially thought by some to be an oddity restricted to the realm of thought experiments. However, Bell’s inequality delimiting local - behavior and the experimental demonstration of its violation more than 25 years ago made it entirely clear that non-local properties of pure quantum states are more than an intellectual curiosity. Entanglement and non-locality are now understood to figure prominently in the microphysical world, a realm into which technology is rapidly hurtling. Information theory is also increasingly (...) recognized by physicists and philosophers as intimately related to the foundations of mechanics. The clearest indicator of this relationship is that between quantum information and entanglement. To some degree, a deep relationship between information and mechanics in the quantum context was already there to be seen upon the introduction by Max Born and Wolfgang Pauli of the idea that the essence of pure quantum states lies in their provision of probabilities regarding the behavior of quantum systems, via what has come to be known as the Born rule. The significance of the relationship between mechanics and information became even clearer with Leo Szilard’s analysis of James Clerk Maxwell’s infamous demon thought experiment. Here, in addition to examining both entanglement and quantum information and their relationship, I endeavor to critically assess the influence of the study of these subjects on the interpretation of quantum theory. (shrink)

We show that data collected from corpuses of documents violate the Clauser-Horne-Shimony-Holt version of Bell’s inequality and therefore indicate the presence of quantum entanglement in their structure. We obtain this result by considering two concepts and their combination and coincidence operations consisting of searches of co-occurrences of exemplars of these concepts in specific corpuses of documents. Measuring the frequencies of these co-occurrences and calculating the relative frequencies as approximate probabilities entering in the CHSH inequality, we obtain manifest violations of (...) the latter for all considered corpuses of documents. In comparing these violations with those analogously obtained in an earlier work for the same combined concepts in psychological coincidence experiments with human participants, also violating the CHSH inequality, we identify the entanglement as being carried by the meaning connection between the two considered concepts within the combination they form. We explain the stronger violation for the corpuses of documents, as compared to the violation in the psychology experiments, as being due to the superior meaning domain of the human mind and, on the other side, to the latter reaching a broader domain of meaning and being possibly also actively influenced during the experimentation. We mention some of the issues to be analyzed in future work such as the violations of the CHSH inequality being larger than the ‘Cirel’son bound’ for all of the considered corpuses of documents. (shrink)

The study of ancient DNA has gained increasing attention in science and society as a tool for tracing hominin evolution. While aDNA research overlaps with the history of population genetics, it embodies a specific configuration of technology, temporality, temperature, and place that, this article suggests, cannot be fully unpacked with existing science and technology studies approaches to population genetics. This article explores this configuration through the 2010 discovery of the Denisovan hominin based on aDNA retrieved from a finger bone and (...) tooth in Siberia. The analysis explores how the Denisovan was enacted as a technoscientific object through the cool and even temperatures of Denisova Cave, assumptions about the connection between individual and population, the status of populations as evolutionary entities, and underlying colonialist and imperialist imaginaries of Siberia and Melanesia. The analysis sheds light on how aDNA research is changing the parameters within which evolutionary history is imagined and conceptualized. Through the case study, it also outlines some ways in which the specific technoscientific and cultural entanglements of aDNA can be critically explored. (shrink)

The purpose of this short article is to build on the work of Ghirardi, Marinatto and Weber and Ladyman, Linnebo and Bigaj, in supporting a redefinition of en- tanglement for “indistinguishable” systems, particularly fermions. According to the proposal, non-separability of the joint state is insufficient for entanglement. The re- definition is justified by its physical significance, as enshrined in three biconditionals whose analogues hold of “distinguishable” systems.