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Open Quantum Systems Decoherence Quantum Thermodynamics

Comment on "Entropic Costs of Extracting Classical Ticks from a Quantum Clock"

arXiv

Authors: Longyan Gong

Year

2026

Paper ID

63707

Status

Preprint

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~2 min

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Abstract

A recent Letter by Wadhia et al. reports a realization of a quantum clock using a double quantum dot (DQD) [Phys. Rev. Lett. 135, 200407 (2005)]. This Comment identifies two fundamental issues: (I) the claimed "quantum clock" exhibits only classical behavior and lacks intrinsic temporal correlations between ticks; it is not sufficient for accurate time as a good clock. (II) the thermodynamic analysis misassigns entropy production and conflates amplification with measurement; the reported combined entropy is an engineering dissipation, not a fundamental cost of quantum timekeeping.

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This paper contributes to the Quantum Thermodynamics research area in the Quantum Articles archive.
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A recent Letter by Wadhia et al.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2605.21833 [2] arXiv https://arxiv.org/abs/2605.21833 [3] Publisher https://arxiv.org/abs/2605.21833

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External citation index: OpenAlex citation signal • updated 2026-06-14 07:21:19

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