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Sophía

Realismo, Relatividad General y el Gato de Schrödinger

Ricardo Restrepo

Published Jul 12, 2024• 1 citation
Publisher

Abstract

The present work examines the nature of reality, including the possibility of freedom, in the framework of modern physics. Additionally, it proposes a reform for the metaphysics of realism.For realism, the world is the way it is independent of the mind. However, general relativity supposesthat the speed of objects and the temporal order of events depend on the frame of referenceadopted. Which frame of reference is adopted depends on human interests. However, there are still physical facts independent of the frame of reference: the speed of light, spacetime distance,and the equivalence of matter and energy, amongst others. On the other hand, the CopenhagenInterpretation supposes that quantum states are in a superposition that is only realized at themoment of observation, leading to the implication that Schrödinger’s cat is both alive and deaduntil observed. However, less incredible realist possibilities are analysed. Modern physics, whetherdeterminist or indeterminist, also threatens the possibility of freedom. The compatibility of freedom as self-government and modern physics is analysed and developed. Although central aspectsof realist metaphysics are conserved, a philosophical-scientific conception of the universe that integrates mental beings within it emerges, which supposes a reform for standard scientific realism. The existence of facts independent of what we happen to think is saved alongside ineliminable mental phenomena.

DOI
10.17163/soph.n37.2024.02

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The present work examines the nature of reality, including the possibility of freedom, in the framework of modern physics. Additionally, it proposes a reform for the metaphysics of realism.For realism, the world is the way it is independent of the mind. However, general relativity supposesthat the speed of objects and the temporal order of events depend on the frame of referenceadopted. Which frame of reference is adopted depends on human interests. However, there are still physical facts independent of the frame of reference: the speed of light, spacetime distance,and the equivalence of matter and energy, amongst others. On the other hand, the CopenhagenInterpretation supposes that quantum states are in a superposition that is only realized at themoment of observation, leading to the implication that Schrödinger’s cat is both alive and deaduntil observed. However, less incredible realist possibilities are analysed. Modern physics, whetherdeterminist or indeterminist, also threatens the possibility of freedom. The compatibility of freedom as self-government and modern physics is analysed and developed. Although central aspectsof realist metaphysics are conserved, a philosophical-scientific conception of the universe that integrates mental beings within it emerges, which supposes a reform for standard scientific realism. The existence of facts independent of what we happen to think is saved alongside ineliminable mental phenomena.
This work aims to analyze the philosophical consequences of the Schrödinger's cat thought experiment, discussing, among other issues, the physical explanation of the experiment and its meaning, the consequences and implications in Quantum Mechanics, namely, the privileged status of the observer, the notion of superposition, the question of self-state and wave collapse, in short, Erwin Schrödinger's criticisms of the orthodox interpretation of Quantum Mechanics. We will deal with the philosophical consequences of Schrödinger's cat mental experiment, seeking to contribute to the understanding of the aspects that differentiate Classical Physics from Quantum Mechanics, in addition to contributing to philosophical discussion in the discussion of realistic and anti-realistic positions that are found in the midst of the debate established between precursors of Quantum Mechanics. It is hoped that this article will enable an expansion of knowledge of the philosophy involved in this entire debate and that it will generate reflections on the ultimate nature of reality.
Scientific realism has traditionally maintained that our best scientific theories can be regarded as more or less true and as representing the world as it is (more or less). However, one of our very best current theories—quantum mechanics—has famously resisted such a realist construal, threatening to undermine the realist stance altogether. The chapters in this volume carefully examine this tension and the reasons behind it, including the underdetermination generated by the multiplicity of formulations and interpretations of quantum physics, each presenting a different way the world could be. Authors in this volume offer a range of alternative ways forward: some suggest new articulations of realism, limiting our commitments in one way or another; others attempt to articulate a ‘third way’ between traditional forms of realism and antirealism, or are critical of such attempts. Still others argue that quantum theory itself should be reconceptualised, or at least alternative formulations should be considered in the hope of evading the problems faced by realism. And some examine the nature of these issues when moving beyond quantum mechanics to quantum field theory. Taken together they offer an exciting new set of perspectives on one of the most fundamental questions in the philosophy of modern physics: how can one be a realist about quantum theory, and what does this realism amount to?
This chapter provides a moderately precise shape to the idea that physical reality is independent of physicists, an idea deeply rooted in the minds of scientists and laymen alike. This idea is particularized through the introduction of supplementary assumptions that are inspired by common sense. The versions of realism thus obtained are discussed in the light of quantum physics. They are found to be unacceptable. In order for realism to be something more than an arbitrary metaphysical construction, physicists should have some grip on reality through their experience. In conventional quantum mechanics, the hypothesis implies that at any time in its history a microscopic particle always possesses a complete set of compatible observables endowed with definite values. Macro-objectivism, in spite of physicists' reference to experience, is distinctly a realistic philosophy, since it assumes that physical objects would exist and have specific properties even if no human beings existed.
Scientific realism holds that the objects of scientific knowledge exist independently of the minds or activities of scientists and those scientific theories are true of that objective world. This is antithetical to the posits of quantum physics, a body of knowledge taken as the seal of the sciences because of its incredible feat, which emphasizes observer created reality, and to that end subjective and probabilistic understanding of realities. Given this background, we contend that, if the thesis of scientific realism were to be taken as sacrosanct, nature would have remained somewhat unfavourable since nobody would have dared to ‘create’ reality other than those originally imposed by nature. And to the quantum physicist, the resort to probabilistic conception of reality is an obvious indication that nature in its dynamism is uncanny and still has billions of tricks for mankind.
The text points out that one of the main contradictions of quantum realism, which is particularly relevant to the social sciences, is the tension between the existence of an observer-independent reality and the idea that this reality is mediated by the cognitive and interpretative processes of the subject. This contradiction arises from the central role of the observer in phenomena such as the collapse of the wave function and their influence on the construction of reality, which challenges the classical notion of an objective, non-perceptual nature. Moreover, the encounter between social realism and socialinterpretivism lies in the fact that, in the social sciences, it is also recognized that human interpretations and actions shape social reality, creating a scenario in which absolute objectivity becomes difficult to sustain. These tensions, therefore enrich the epistemological and ontological debate, showing that the contradictions of quantum realism transcend physics and connect deeply with the difficulties and dynamics of the social construction of reality.
The present study is concerned with the problem of realism in quantum mechanics. Contrary to the prevailing view that quantum mechanics forces us to abandon the concept of realism and reality, the author attempts to substantiate another standpoint. Quantum objects indeed exist in a different way from classical bodies. Before the act of measurement begins, one cannot attribute any specific properties to the quantum object observed, as they only occur in the course observation. The concept of observation, however, should not be interpreted as the inclusion of subjective traits in the description of nature. Observation records processes in space and time and establishes the fact of transition from the potential to the reality. The potential is described by a wave function, which in its meaning does not fall in the habitual space and time, whereas the actual is described in terms of a reduction of the wave function, i.e. the transition from a range of possible states to the single one, the observed. Whatever has been observed, in contrast, already belongs to ordinary space and time and can be detected. What follows is that, in quantum mechanics, it is the notion of reality which needs to be reconsidered, not the realism as such rejected. A reconsideration of this sort is conducted here within the framework of a double-modus picture of reality including both potential and actual being, where the quantum level of existence is distinguished from the observed modi of being as described by means of classical concepts. Such a scheme can be described in terms of Aristotelian metaphysics (the fact first pointed out by Heisenberg). The act of transition from potential to actual can be accounted for both in the language of Aristotle’s metaphysics and the language of modern science. In traditional metaphysics it is called the 'principle of individuation', while in modern science it is known as the extended Mach principle. It is argued that the development of these ideas leads to the rejection of Cartesian paradigm in which the existence of a material object always means an existence in space and time.