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Thermality versus Objectivity: Can They Peacefully Coexist?

Thao P Le1, Andreas Winter2,3, Gerardo Adesso1

  • 1School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, UK.

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|November 27, 2021
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Summary
This summary is machine-generated.

Quantum systems can lose objectivity when they thermalize. This study finds that thermal and objective quantum states generally conflict, but can coexist at high temperatures, low temperatures, or with large environments.

Keywords:
Quantum Darwinismobjectivityopen quantum systemsthermalisation

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Area of Science:

  • Quantum physics
  • Statistical mechanics
  • Information theory

Background:

  • Quantum systems interact with external environments, leading to processes like decoherence and equilibration.
  • Macroscopic objects exhibit both thermal and objective properties, suggesting potential coexistence in quantum systems.

Purpose of the Study:

  • To investigate the compatibility of thermal and objective states in quantum systems.
  • To identify conditions under which quantum thermalization and objectivity can coexist.

Main Methods:

  • Analysis of quantum states considering environmental interactions.
  • Examination of the overlap and conflict between thermal and objective properties.

Main Results:

  • Quantum thermal and objective states generally conflict; one typically precludes the other.
  • Coexistence is more probable in specific regimes: high temperatures, non-degenerate low temperatures, and large environments.

Conclusions:

  • The coexistence of thermal and objective states in quantum systems is generally limited.
  • Specific conditions, mirroring macroscopic experiences, allow for their overlap, particularly in high-temperature or large-environment scenarios.