Quantum theory of the classical: quantum jumps, Born’s Rule and objective classical reality via quantum Darwinism

Zurek, Wojciech Hubert

doi:10.1098/rsta.2018.0107

Title: Quantum theory of the classical: quantum jumps, Born’s Rule and objective classical reality via quantum Darwinism

Journal Article · Mon May 28 00:00:00 EDT 2018 · Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences

DOI:https://doi.org/10.1098/rsta.2018.0107· OSTI ID:1467215

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, the emergence of the classical world from the quantum substrate of our Universe is a long-standing conundrum. In this paper, I describe three insights into the transition from quantum to classical that are based on the recognition of the role of the environment. I begin with the derivation of preferred sets of states that help to define what exists—our everyday classical reality. They emerge as a result of the breaking of the unitary symmetry of the Hilbert space which happens when the unitarity of quantum evolutions encounters nonlinearities inherent in the process of amplification—of replicating information. This derivation is accomplished without the usual tools of decoherence, and accounts for the appearance of quantum jumps and the emergence of preferred pointer states consistent with those obtained via environment-induced superselection, or einselection. The pointer states obtained in this way determine what can happen—define events—without appealing to Born’s Rule for probabilities. Therefore, p_k = |ψ_k|² can now be deduced from the entanglement-assisted invariance, or envariance—a symmetry of entangled quantum states. With probabilities at hand, one also gains new insights into the foundations of quantum statistical physics. Moreover, one can now analyse the information flows responsible for decoherence. These information flows explain how the perception of objective classical reality arises from the quantum substrate: the effective amplification that they represent accounts for the objective existence of the einselected states of macroscopic quantum systems through the redundancy of pointer state records in their environment—through quantum Darwinism.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1467215

Report Number(s):: LA-UR-18-22299

Journal Information:: Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences, Vol. 376, Issue 2123; ISSN 1364-503X

Publisher:: The Royal Society PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 22 works

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