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Vassilios Karakostas
University of Athens
  1. Humean Supervenience in the Light of Contemporary Science.Vassilios Karakostas - 2009 - Metaphysica 10 (1):1-26.
    It is shown that Lewis’ ontological doctrine of Humean supervenience incorporates at its foundation the so-called separability principle of classical physics. In view of the systematic violation of the latter within quantum mechanics, the claim that contemporary physical science may posit non-supervenient relations beyond the spatiotemporal ones is reinforced on a foundational basis concerning constraints on the state representation of physical systems. Depending on the mode of assignment of states to quantum systems — unit state vectors versus statistical density operators (...)
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  2. Nonseparability, Potentiality, and the Context-Dependence of Quantum Objects.Vassilios Karakostas - 2007 - Journal for General Philosophy of Science / Zeitschrift für Allgemeine Wissenschaftstheorie 38 (2):279-297.
    Standard quantum mechanics undeniably violates the notion of separability that classical physics accustomed us to consider as valid. By relating the phenomenon of quantum nonseparability to the all-important concept of potentiality, we effectively provide a coherent picture of the puzzling entangled correlations among spatially separated systems. We further argue that the generalized phenomenon of quantum nonseparability implies contextuality for the production of well-defined events in the quantum domain, whereas contextuality entails in turn a structural-relational conception of quantal objects, viewed as (...)
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  3. Forms of Quantum Nonseparability and Related Philosophical Consequences.Vassilios Karakostas - 2004 - Journal for General Philosophy of Science / Zeitschrift für Allgemeine Wissenschaftstheorie 35 (2):283 - 312.
    Standard quantum mechanics unquestionably violates the separability principle that classical physics (be it point-like analytic, statistical, or field-theoretic) accustomed us to consider as valid. In this paper, quantum nonseparability is viewed as a consequence of the Hilbert-space quantum mechanical formalism, avoiding thus any direct recourse to the ramifications of Kochen-Specker’s argument or Bell’s inequality. Depending on the mode of assignment of states to physical systems – unit state vectors versus non-idempotent density operators – we distinguish between strong/relational and weak/deconstructional forms (...)
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  4.  79
    Realism and Objectivism in Quantum Mechanics.Vassilios Karakostas - 2012 - Journal for General Philosophy of Science / Zeitschrift für Allgemeine Wissenschaftstheorie 43 (1):45-65.
    The present study attempts to provide a consistent and coherent account of what the world could be like, given the conceptual framework and results of contemporary quantum theory. It is suggested that standard quantum mechanics can, and indeed should, be understood as a realist theory within its domain of application. It is pointed out, however, that a viable realist interpretation of quantum theory requires the abandonment or radical revision of the classical conception of physical reality and its traditional philosophical presuppositions. (...)
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  5.  10
    EPSA11 Perspectives and Foundational Problems in Philosophy of Science.Vassilios Karakostas & Dennis Dieks (eds.) - 2013 - Springer.
    This book contains a selection of original conference papers covering all major fields in the philosophy of science, that have been organized into themes.
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  6.  36
    Realism Vs. Constructivism in Contemporary Physics: The Impact of the Debate on the Understanding of Quantum Theory and its Instructional Process.Vassilios Karakostas & Pandora Hadzidaki - 2005 - Science & Education 14 (7-8):607-629.
    In the present study we attempt to incorporate the philosophical dialogue about physical reality into the instructional process of quantum mechanics. Taking into account that both scientific realism and constructivism represent, on the basis of a rather broad spectrum, prevalent philosophical currents in the domain of science education, the compatibility of their essential commitments is examined against the conceptual structure of quantum theory. It is argued in this respect that the objects of science do not simply constitute ‘personal constructions’ of (...)
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  7.  60
    Correspondence Truth and Quantum Mechanics.Vassilios Karakostas - 2014 - Axiomathes 24 (3):343-358.
    The logic of a physical theory reflects the structure of the propositions referring to the behaviour of a physical system in the domain of the relevant theory. It is argued in relation to classical mechanics that the propositional structure of the theory allows truth-value assignment in conformity with the traditional conception of a correspondence theory of truth. Every proposition in classical mechanics is assigned a definite truth value, either ‘true’ or ‘false’, describing what is actually the case at a certain (...)
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  8.  81
    A Categorial Semantic Representation of Quantum Event Structures.Elias Zafiris & Vassilios Karakostas - 2013 - Foundations of Physics 43 (9):1090-1123.
    The overwhelming majority of the attempts in exploring the problems related to quantum logical structures and their interpretation have been based on an underlying set-theoretic syntactic language. We propose a transition in the involved syntactic language to tackle these problems from the set-theoretic to the category-theoretic mode, together with a study of the consequent semantic transition in the logical interpretation of quantum event structures. In the present work, this is realized by representing categorically the global structure of a quantum algebra (...)
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  9.  91
    On the Brussels School's Arrow of Time in Quantum Theory.Vassilios Karakostas - 1996 - Philosophy of Science 63 (3):374-400.
    This paper examines the problem of founding irreversibility on reversible equations of motion from the point of view of the Brussels school's recent developments in the foundations of quantum statistical mechanics. A detailed critique of both their 'subdynamics' and 'transformation' theory is given. It is argued that the subdynamics approach involves a generalized form of 'coarse-graining' description, whereas, transformation theory cannot lead to truly irreversible processes pointing to a preferred direction of time. It is concluded that the Brussels school's conception (...)
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  10.  91
    Decoherence in Unorthodox Formulations of Quantum Mechanics.Vassilios Karakostas & Michael Dickson - 1995 - Synthese 102 (1):61 - 97.
    The conceptual structure of orthodox quantum mechanics has not provided a fully satisfactory and coherent description of natural phenomena. With particular attention to the measurement problem, we review and investigate two unorthodox formulations. First, there is the model advanced by GRWP, a stochastic modification of the standard Schrödinger dynamics admitting statevector reduction as a real physical process. Second, there is the ontological interpretation of Bohm, a causal reformulation of the usual theory admitting no collapse of the statevector. Within these two (...)
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  11.  20
    The Conventionality of Simultaneity in the Light of the Spinor Representation of the Lorentz Group.Vassilios Karakostas - 1997 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 28 (2):249-276.
  12.  1
    On the Notion of Truth in Quantum Mechanics.Vassilios Karakostas & Elias Zafiris - 2018 - Proceedings of the XXIII World Congress of Philosophy 60:19-24.
    The category-theoretic representation of quantum event structures provides a canonical setting for confronting the fundamental problem of truth valuation in quantum mechanics as exemplified, in particular, by Kochen-Specker’s theorem. In the present study, this is realized by representing categorically the global structure of a quantum algebra of events in terms of sheaves of local Boolean frames forming Boolean localization functors. The category of sheaves is a topos providing the possibility of applying the powerful logical classification methodology of topos theory with (...)
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  13.  34
    Contextual Semantics in Quantum Mechanics From a Categorical Point of View.Vassilios Karakostas & Elias Zafiris - 2017 - Synthese 194 (3).
    The category-theoretic representation of quantum event structures provides a canonical setting for confronting the fundamental problem of truth valuation in quantum mechanics as exemplified, in particular, by Kochen–Specker’s theorem. In the present study, this is realized on the basis of the existence of a categorical adjunction between the category of sheaves of variable local Boolean frames, constituting a topos, and the category of quantum event algebras. We show explicitly that the latter category is equipped with an object of truth values, (...)
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  14.  9
    The Conventionality of Simultaneity in the Light of the Spinor Representation of the Lorentz Group.Vassilios Karakostas - 1997 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 28 (2):249-276.
  15.  9
    Truth as Contextual Correspondence in Quantum Mechanics.Vassilios Karakostas - 2015 - Philosophia Scientae 19:199-212.
  16. Recent Progress in Philosophy of Science: Perspectives and Foundational Problems.Dennis Dieks & Vassilios Karakostas (eds.) - forthcoming - Springer.
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  17. On the Notion of Truth in Quantum Mechanics: A Category-Theoretic Standpoint.Vassilios Karakostas & Elias Zafiris - 2016 - In Diederik Aerts, Christian de Ronde, Hector Freytes & Roberto Giuntini (eds.), Probing the Meaning and Structure of Quantum Mechanics: Semantics, Dynamics and Identity. World Scientific. pp. 1-43.
    The category-theoretic representation of quantum event structures provides a canonical setting for confronting the fundamental problem of truth valua- tion in quantum mechanics as exemplified, in particular, by Kochen-Specker’s theorem. In the present study, this is realized on the basis of the existence of a categorical adjunction between the category of sheaves of variable local Boolean frames, constituting a topos, and the category of quantum event al- gebras. We show explicitly that the latter category is equipped with an object of (...)
     
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  18. Recent Progress in Philosophy of Science: Perspectives and Foundational Problems. The Third European Philosophy of Science Association Proceedings.Vassilios Karakostas & Dennis Dieks (eds.) - forthcoming - Springer.
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