20 found
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  1.  42
    Isomerism and Decoherence.Sebastian Fortin, Olimpia Lombardi & Juan Camilo Martínez González - 2016 - Foundations of Chemistry 18 (3):225-240.
    In the present paper we address the problem of optical isomerism embodied in the socalled “Hund’s paradox”, which points to the difficulty to account for chirality by means of quantum mechanics. In particular, we explain the answer to the problem proposed by the theory of decoherence. The purpose of this article is to challenge this answer on the basis of a conceptual analysis of the phenomenon of decoherence, that reveals the limitations of the theory of decoherence to solve the difficulties (...)
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  2.  16
    A Pluralist View About Information.Olimpia Lombardi, Sebastian Fortin & Leonardo Vanni - unknown
    Focusing on Shannon information, this article shows that, even on the basis of the same formalism, there may be different interpretations of the concept of information, and that disagreements may be deep enough to lead to very different conclusions about the informational characterization of certain physical situations. On this basis, a pluralist view is argued for, according to which the concept of information is primarily a formal concept that can adopt different interpretations that are not mutually exclusive, but each useful (...)
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  3.  15
    Partial Traces in Decoherence and in Interpretation: What Do Reduced States Refer To?Sebastian Fortin & Olimpia Lombardi - 2014 - Foundations of Physics 44 (4):426-446.
    The interpretation of the concept of reduced state is a subtle issue that has relevant consequences when the task is the interpretation of quantum mechanics itself. The aim of this paper is to argue that reduced states are not the quantum states of subsystems in the same sense as quantum states are states of the whole composite system. After clearly stating the problem, our argument is developed in three stages. First, we consider the phenomenon of environment-induced decoherence as an example (...)
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  4.  5
    Interpretation and Decoherence: A Contribution to the Debate Vassallo & Esfeld Versus Crull.Sebastian Fortin & Olimpia Lombardi - 2017 - Foundations of Physics 47 (11):1423-1427.
    Two recent papers appeared in FOOP disagree regarding the role played by decoherence in quantum physics. On the one hand, Elise Crull considers that decoherence, by itself, solves many conceptual problems in quantum physics, with no need of interpretative considerations. On the other hand, Antonio Vassallo and Michael Esfeld reply by correctly claiming that, although decoherence is a powerful tool to deal with conceptual problems, it does not dispense us from interpreting the formalism. In this brief note we want to (...)
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  5.  33
    Deflating the Deflationary View of Information.Olimpia Lombardi, Sebastian Fortin & Cristian López - unknown
    In the field of the philosophy of physics, Christopher Timpson has published several works where he accurately designs an interpretation of the technical concept of information. In particular, he proposes a deflationary view about information, according to which the term ‘information’ is an abstract noun and, as a consequence, information is not part of the material contents of the world. The main purpose of the present article consists in supplying a critical analysis of Timpson’s proposal. Moreover we propose a strategy (...)
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  6.  4
    Quantum Mechanics: Symmetry and Interpretation.Sebastian Fortin & Olimpia Lombardi - unknown
    In this paper it will be argued that any realist interpretation of quantum mechanics intending to preserve the objectivity of the set of the definite-valued observables should require such a set to be invariant under the symmetry group of the theory. In particular, it will be shown that the natural way to reach this goal is to appeal to the Casimir operators of the Galilean group. Additionally, this idea will be generalized in two ways: by selecting the definite-valued observables of (...)
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  7. Compatibility Between Environment-Induced Decoherence and the Modal-Hamiltonian Interpretation of Quantum Mechanics.Olimpia Lombardi, Juan Sebastián Ardenghi, Sebastian Fortin & Mario Castagnino - unknown
    Given the impressive success of environment-induced decoherence, nowadays no interpretation of quantum mechanics can ignore its results. The modal-Hamiltonian interpretation has proved to be effective for solving several interpretative problems but, since its actualization rule applies to closed systems, it seems to stand at odds of EID. The purpose of this paper is to show that this is not the case: the states einselected by the interaction with the environment according to EID are the eigenvectors of an actual-valued observable belonging (...)
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  8.  3
    About the Nature of the Wave Function and its Dimensionality: The Case of Quantum Chemistry.Sebastian Fortin & Jesús Alberto Jaimes Arriaga - unknown
    The problem of the 3N dimensions of the wave function is of particular interest in the philosophy of physics. In this work, we will recall the main positions about the nature and dimensionality of the wave function and we will introduce a new perspective, coming from quantum chemistry. For this, we will bring to light the formal operations that underlie the independent electron approximation. On this basis, we will point out how quantum chemistry can offer new arguments that contribute to (...)
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  9.  7
    Why Molecular Structure Cannot Be Strictly Reduced to Quantum Mechanics.Juan Camilo Martínez González, Sebastian Fortin & Olimpia Lombardi - forthcoming - Foundations of Chemistry:1-15.
    Perhaps the hottest topic in the philosophy of chemistry is that of the relationship between chemistry and physics. The problem finds one of its main manifestations in the debate about the nature of molecular structure, given by the spatial arrangement of the nuclei in a molecule. The traditional strategy to address the problem is to consider chemical cases that challenge the definition of molecular structure in quantum–mechanical terms. Instead of taking that top-down strategy, in this paper we face the problem (...)
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  10.  2
    Classical Limit and Quantum Logic.Sebastian Fortin & Federico Holik - unknown
    The more common scheme to explain the classical limit of quantum mechanics includes decoherence, which removes from the state the interference terms classically inadmissible since embodying non-Booleanity. In this work we consider the classical limit from a logical viewpoint, as a quantum-to-Boolean transition. The aim is to open the door to a new study based on dynamical logics, that is, logics that change over time. In particular, we appeal to the notion of hybrid logics to describe semiclassical systems. Moreover, we (...)
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  11.  2
    The Relationship Between Chemistry and Physics From the Perspective of Bohmian Mechanics.Sebastian Fortin, Olimpia Lombardi & Juan Camilo Martínez - unknown
    Although during the last decades the philosophy of chemistry has greatly extended its thematic scope, the main difficulties appear in the attempt to link the chemical description of atoms and molecules and the description supplied by quantum mechanics. The aim of this paper is to analyze how the difficulties that threaten the continuous conceptual link between molecular chemistry and quantum mechanics can be overcome or, at least, moderated from the perspective of BM. With this purpose, in “The quantum-mechanical challenges” section (...)
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  12.  11
    A New Application of the Modal-Hamiltonian Interpretation of Quantum Mechanics: The Problem of Optical Isomerism.Sebastian Fortin, Olimpia Lombardi & Juan Camilo Martínez González - 2018 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 62:123-135.
    The modal-Hamiltonian interpretation belongs to the modal family of interpretations of quantum mechanics. By endowing the Hamiltonian with the role of selecting the subset of the definite-valued observables of the system, it accounts for ideal and non-ideal measurements, and also supplies a criterion to distinguish between reliable and non-reliable measurements in the non-ideal case. It can be reformulated in an explicitly invariant form, in terms of the Casimir operators of the Galilean group, and the compatibility of the MHI with the (...)
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  13.  78
    The Problem of Identifying the System and the Environment in the Phenomenon of Decoherence.Olimpia Lombardi, Sebastian Fortin & Mario Castagnino - 2010 - In Henk W. de Regt (ed.), Epsa Philosophy of Science: Amsterdam 2009. Springer. pp. 161--174.
    According to the environment-induced approach to decoherence, the split of the Universe into the degrees of freedom which are of direct interest to the observer and the remaining degrees of freedom is absolutely essential for decoherence. However, the EID approach offers no general criterion for deciding where to place the “cut” between system and environment: the environment may be “external” or “internal”. The main purpose of this paper is to argue that decoherence is a relative phenomenon, better understood from a (...)
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  14.  1
    Non-Unitary Evolution of Quantum Logics.Sebastian Fortin, Federico Holik & Leonardo Vanni - unknown
    In this work we present a dynamical approach to quantum logics. By changing the standard formalism of quantum mechanics to allow non-Hermitian operators as generators of time evolution, we address the question of how can logics evolve in time. In this way, we describe formally how a non-Boolean algebra may become a Boolean one under certain conditions. We present some simple models which illustrate this transition and develop a new quantum logical formalism based in complex spectral resolutions, a notion that (...)
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  15.  1
    On the Interpretation of Probabilities in Generalized Probabilistic Models.Federico Holik, Sebastian Fortin, Gustavo Bosyk & Angelo Plastino - unknown
    We discuss generalized pobabilistic models for which states not necessarily obey Kolmogorov's axioms of probability. We study the relationship between properties and probabilistic measures in this setting, and explore some possible interpretations of these measures.
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  16.  21
    Quantum Decoherence: A Logical Perspective.Sebastian Fortin & Leonardo Vanni - 2014 - Foundations of Physics 44 (12):1258-1268.
    The so-called classical limit of quantum mechanics is generally studied in terms of the decoherence of the state operator that characterizes a system. This is not the only possible approach to decoherence. In previous works we have presented the possibility of studying the classical limit in terms of the decoherence of relevant observables of the system. On the basis of this approach, in this paper we introduce the classical limit from a logical perspective, by studying the way in which the (...)
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  17.  6
    No Information Without Manipulation.Olimpia Lombardi, Cristian López & Sebastian Fortin - unknown
    The aim of the present paper is to supply an elucidation of the concept of information in the communicational context. For this purpose, two traditional interpretations of the concept of information, the epistemic and the physical interpretations, will be distinguished, and their specific problems will be considered. In particular, whereas the epistemic interpretation misses an essential feature of communication, the physical interpretation faces difficulties in the quantum domain. The final goal will be to argue that the difficulties of the physical (...)
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  18.  2
    Medición y decoherencia desde la perspectiva de los sistemas cerrados.Sebastian Fortin - 2013 - Anuario Filosófico 46 (2):281 - 310.
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  19. Let Us Build Better Boats: An Answer to Jeffrey Seeman’s “Moving Beyond Insularity in the History, Philosophy, and Sociology of Chemistry”.Sebastian Fortin, Olimpia Lombardi & Juan Camilo Martínez González - 2018 - Foundations of Chemistry 20 (3):261-264.
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  20. Quantum Worlds. Different Perspectives About the Ontology of Quantum Mechanics.Olimpia Lombardi, Sebastian Fortin, Cristian López & Frederico Holik (eds.) - forthcoming - Cambridge University Press.
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