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  1. GianCarlo Ghirardi (2013). The Parts and the Whole: Collapse Theories and Systems with Identical Constituents. Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 44 (1):40-47.
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  2. GianCarlo Ghirardi & Raffaele Romano (2013). About Possible Extensions of Quantum Theory. Foundations of Physics 43 (7):881-894.
    Recently it has been claimed that no extension of quantum theory can have improved predictive power, the statement following, according to the authors, from the assumptions of free will and of the correctness of quantum predictions concerning the correlations of measurement outcomes. Here we prove that the argument is basically flawed by an inappropriate use of the assumption of free will. In particular, among other implications, the claim, if correct, would imply that Bohmian Mechanics is incompatible with free will. This (...)
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  3. GianCarlo Ghirardi (2011). Vedral, V.: Decoding Reality: The Universe as Quantum Information. [REVIEW] Foundations of Physics 41 (4):637-639.
  4. GianCarlo Ghirardi (2010). Does Quantum Nonlocality Irremediably Conflict with Special Relativity? Foundations of Physics 40 (9-10):1379-1395.
    We reconsider the problem of the compatibility of quantum nonlocality and the requests for a relativistically invariant theoretical scheme. We begin by discussing a recent important paper by T. Norsen on this problem and we enlarge our considerations to give a general picture of the conceptually relevant issue to which this paper is devoted.
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  5. GianCarlo Ghirardi & Luca Marinatto (2009). A General Proof of Nonlocality Without Inequalities for Bipartite States. In Wayne C. Myrvold & Joy Christian (eds.), Quantum Reality, Relativistic Causality, and Closing the Epistemic Circle. Springer. 95--104.
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  6. Giancarlo Ghirardi, Collapse Theories. Stanford Encyclopedia of Philosophy.
    Quantum mechanics, with its revolutionary implications, has posed innumerable problems to philosophers of science. In particular, it has suggested reconsidering basic concepts such as the existence of a world that is, at least to some extent, independent of the observer, the possibility of getting reliable and objective knowledge about it, and the possibility of taking (under appropriate circumstances) certain properties to be objectively possessed by physical systems. It has also raised many others questions which are well known to those involved (...)
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  7. GianCarlo Ghirardi (2008). Reconsidering Mermin's “In Praise of Measurement”. Foundations of Physics 38 (11):1011-1019.
    We critically analyze a recent paper by D. Mermin and we compare his statements with Bell’s position on the problems he is discussing.
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  8. Angelo Bassi & GianCarlo Ghirardi (2007). The Conway-Kochen Argument and Relativistic GRW Models. Foundations of Physics 37 (2):169-185.
    In a recent paper, Conway and Kochen proposed what is now known as the “Free Will theorem” which, among other things, should prove the impossibility of combining GRW models with special relativity, i.e., of formulating relativistically invariant models of spontaneous wavefunction collapse. Since their argument basically amounts to a non-locality proof for any theory aiming at reproducing quantum correlations, and since it was clear since very a long time that any relativistic collapse model must be non-local in some way, we (...)
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  9. Giancarlo Ghirardi (2007). Sneaking a Look at God's Cards, Revised Edition: Unraveling the Mysteries of Quantum Mechanics. Princeton University Press.
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  10. GianCarlo Ghirardi (2005). Quantum Theory as an Emergent Phenomenon: The Statistical. Philosophy of Science 72 (4):642-645.
  11. Jonathan Bain, Timothy Bays, Katherine A. Brading, Stephen G. Brush, Murray Clarke, Sharyn Clough, Jonathan Cohen, Giancarlo Ghirardi, Brendan S. Gillon & Robert G. Hudson (2004). First Page Preview. International Studies in the Philosophy of Science 18 (2-3).
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  12. GianCarlo Ghirardi (2002). Making Quantum Theory Compatible with Realism. Foundations of Science 7 (1-2):11-47.
    After a brief account of theway quantum theory deals with naturalprocesses, the crucial problem that such atheory meets, the measurement or, better, themacro-objectification problem is discussed.The embarrassing aspects of the occurrence ofentangled states involving macroscopic systemsare analyzed in details. The famous example ofSchroedinger's cat is presented and it ispointed out how the combined interplay of thesuperposition principle and the ensuingentanglement raises some serious difficultiesin working out a satisfactory quantum worldview, agreeing with our definiteperceptions. The orthodox solution to themacro-objectification problem, i.e. (...)
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  13. Angelo Bassi & GianCarlo Ghirardi (2001). Counting Marbles: Reply to Clifton and Monton. British Journal for the Philosophy of Science 52 (1):125-130.
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  14. GianCarlo Ghirardi (2000). Local Measurements of Nonlocal Observables and the Relativistic Reduction Process. Foundations of Physics 30 (9):1337-1385.
    In this paper we reconsider the constraints which are imposed by relativistic requirements to any model of dynamical reduction. We review the debate on the subject and we call attention on the fundamental contributions by Aharonov and Albert. Having done this we present a new formulation, which is much simpler and more apt for our analysis, of the proposal put forward by these authors to perform measurements of nonlocal observables by means of local interactions and detections. We take into account (...)
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  15. Angelo Bassi & GianCarlo Ghirardi (1999). Discussion. More About Dynamical Reduction and the Enumeration Principle. British Journal for the Philosophy of Science 50 (4):719-734.
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  16. Angelo Bassi & GianCarlo Ghirardi (1999). More About Dynamical Reduction and the Enumeration Principle. British Journal for the Philosophy of Science 50 (4):719 - 734.
    In view of the arguments put forward by Clifton and Monton [this volume], we reconsider the alleged conflict of dynamical reduction models with the enumeration principle. We prove that our original analysis of such a problem is correct, that the GRW model does not meet any difficulty and that the reasoning of the above authors is inappropriate since it does not take into account the correct interpretation of the dynamical reduction theories.
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  17. GianCarlo Ghirardi (1997). Quantum Dynamical Reduction and Reality. Erkenntnis 45:249-265.
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  18. Giancarlo Ghirardi (1996). Quantum Dynamical Reduction and Reality: Replacing Probability Densities with Densities in Real Space. [REVIEW] Erkenntnis 45 (2-3):349 - 365.
    Consideration is given to recent attempts to solve the objectification problem of quantum mechanics by considering nonlinear and stochastic modifications of Schrödinger's evolution equation. Such theories agree with all predictions of standard quantum mechanics concerning microsystems but forbid the occurrence of superpositions of macroscopically different states. It is shown that the appropriate interpretation for such theories is obtained by replacing the probability densities of standard quantum mechanics with mass densities in real space. Criteria allowing a precise characterization of the idea (...)
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  19. GianCarlo Ghirardi & Renata Grassi (1994). Outcome Predictions and Property Attribution: The EPR Argument Reconsidered. Studies in History and Philosophy of Science Part A 25 (3):397-423.
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  20. GianCarlo Ghirardi & Philip Pearle (1990). Dynamical Reduction Theories: Changing Quantum Theory so the Statevector Represents Reality. PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association 1990:19 - 33.
    The propositions, that what we see around us is real and that reality should be represented by the statevector, conflict with quantum theory. In quantum theory, the statevector can readily become a sum of states of comparable norm, each state representing a different reality. In this paper we present the Continuous Spontaneous Localization (CSL) theory, in which a modified Schrodinger equation, while scarcely affecting the dynamics of a microscopic system, rapidly "reduces" the statevector of a macroscopic system to a state (...)
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  21. GianCarlo Ghirardi & Philip Pearle (1990). Elements of Physical Reality, Nonlocality and Stochasticity in Relativistic Dynamical Reduction Models. PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association 1990:35 - 47.
    The problem of getting a relativistic generalization of the CSL dynamical reduction model, which has been presented in part I, is discussed. In so doing we have the opportunity to introduce the idea of a stochastically invariant theory. The theoretical model we present, that satisfies this kind of invariance requirement, offers us the possibility to reconsider, from a new point of view, some conceptually relevant issues such as nonlocality, the legitimacy of attributing elements of physical reality to physical systems and (...)
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  22. GianCarlo Ghirardi, Alberto Rimini & Tullio Weber (1986). Unified Dynamics for Microscopic and Macroscopic Systems. Physical Review D 34 (D):470–491.
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