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Open Quantum Systems Decoherence

Wigner function method for the Gibbons-Hawking and the Unruh effect

arXiv
Authors: Ziv Landau, Ulf Leonhardt

Year

2024

Paper ID

66553

Status

Preprint

Abstract Read

~2 min

Abstract Words

103

Citations

N/A

Abstract

An observer at rest with the expanding universe experiences some extra noise in the quantum vacuum, and so does an accelerated observer in a vacuum at rest (in Minkowski space). The literature mainly focuses on the ideal cases of exponential expansion (de-Sitter space) or uniform acceleration (Rindler trajectories) or both, but the real cosmic expansion is non-exponential and real accelerations are non-uniform. Here we use the frequency-time Wigner function of vacuum correlations to define time-dependent spectra. We found excellent Planck spectra for a class of realistic cosmological models, but also strongly non-Planckian, negative Wigner functions for a standard scenario testable with laboratory analogues.

Why This Paper Matters

  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
  • It adds a 2024 reference point for readers tracking recent quantum research.
  • An observer at rest with the expanding universe experiences some extra noise in the quantum vacuum, and so does an accelerated observer in a vacuum at rest (in Minkowski space).

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2406.09339 [2] arXiv https://arxiv.org/abs/2406.09339 [3] Publisher https://arxiv.org/abs/2406.09339

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