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Feedback-Enhanced Quantum Metrology and Clock Precision under Thermodynamic Uncertainty — arXiv:2609.00622

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.00622
License (as archived): CC0-1.0
Archived: 2026-10-17T07:20:53.426Z
SHA-256 of the archived text: 5b986816600ba79d006081082a508103f278aff83f310ed308372416cdf73cbf
Stable URL of this page: https://metraipolis.com/documento/dc_06cc2bf99682

How to cite

Feedback-Enhanced Quantum Metrology and Clock Precision under Thermodynamic Uncertainty — arXiv:2609.00622 — arXiv (en), https://arxiv.org/abs/2609.00622 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_06cc2bf99682 (Metraipolis archive dc_06cc2bf99682, sha256 5b986816600ba79d006081082a508103f278aff83f310ed308372416cdf73cbf)

BibTeX

@misc{dc06cc2bf99682,
  title = {Feedback-Enhanced Quantum Metrology and Clock Precision under Thermodynamic Uncertainty — arXiv:2609.00622},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.00622},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_06cc2bf99682; sha256 5b986816600ba79d006081082a508103f278aff83f310ed308372416cdf73cbf},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.00622. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Feedback can convert continuously monitored quantum jumps into a thermodynamic resource. We formulate full counting statistics for open quantum systems under unital jump feedback by incorporating the feedback maps into the tilted generator. The resulting trajectory ensemble determines both current fluctuations and the Fisher information of the measurement record. We show that feedback can enhance reservoir-parameter estimation and clock precision without necessarily changing average thermodynamic currents. This enhanced precision is not bounded by reservoir entropy production alone. By embedding the reduced dynamics in an enlarged measurement-feedback process, we derive a feedback-modified thermodynamic uncertainty relation in which the information entropy production of the feedback apparatus supplies the missing cost. A charge-monitored double quantum dot illustrates the framework: jump-conditioned feedback improves thermometry and chemical-potential sensing, and stabilizes a quantum clock defined by output-current ticks.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-02 in quant-ph).
Categorie arXiv: Statistical Mechanics (cond-mat.stat-mech) ; Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2609.00622 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-17T07:14:18.901Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-09-02?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).