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Open Quantum Systems Decoherence

Arrow of Time for Continuous Quantum Measurement

arXiv
Authors: Justin Dressel, Areeya Chantasri, Andrew N. Jordan, Alexander N. Korotkov

Year

2016

Paper ID

42981

Status

Preprint

Abstract Read

~2 min

Abstract Words

94

Citations

N/A

Abstract

We investigate the statistical arrow of time for a quantum system being monitored by a sequence of measurements. For a continuous qubit measurement example, we demonstrate that time-reversed evolution is always physically possible, provided that the measurement record is also negated. Despite this restoration of dynamical reversibility, a statistical arrow of time emerges, and may be quantified by the log-likelihood difference between forward and backward propagation hypotheses. We then show that such reversibility is a universal feature of non-projective measurements, with forward or backward Janus measurement sequences that are time-reversed inverses of each other.

Why This Paper Matters

  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
  • It adds a 2016 reference point for readers tracking recent quantum research.
  • We investigate the statistical arrow of time for a quantum system being monitored by a sequence of measurements.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1610.03818 [2] arXiv https://arxiv.org/abs/1610.03818 [3] Publisher https://arxiv.org/abs/1610.03818

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