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Time evolution of the von Neumann entropy in open quantum system

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arxiv 2405.11824 v1 pith:QJNOWV4F submitted 2024-05-20 quant-ph

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keywords quantumentropyopenneumannsystembounddecoherenceevolution
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Control of open quantum dynamics is of great interest for realizing quantum technologies. Therefore, it is an important task to quantify and characterize the entropy for open quantum systems under decoherence. In this paper, we study the time evolution of the von Neumann entropy for open quantum systems described by the Lindblad master equation. Note that, in particular, when the decoherence corresponds to the measurement for the observable in the system, the von Neumann entropy tends to monotonically increases as the variance becomes larger. Furthermore, we present a lower bound of the von Neumann entropy in the long-time limit. This lower bound has advantages of being straightforwardly calculated and applicable to a general Markovian open quantum system.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Thermodynamics of the Page curve in Markovian open quantum systems

    quant-ph 2025-01 conditional novelty 5.0 of 10

    In Markovian open quantum systems at zero temperature, the subsystem entropy peaks when half the initial energy is gone, and the decrease is tied to heat outflow.

  2. Spontaneous Emission, Work Potential and Relaxation-Limited Processes in Setting Limits on Solar Energy Conversion Efficiency

    physics.app-ph 2026-04 unverdicted novelty 4.0 of 10

    A simplified free-energy model for radiation estimates the thermodynamic maximum for light-to-usable-energy conversion at approximately 74%, validated by reproducing the Shockley-Queisser limit of 33%.

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