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Cross-Spectral Reservoir Correlations as a Resource for Finite-Time Quantum Otto Engines — arXiv:2608.30496

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.30496
License (as archived): CC0-1.0
Archived: 2026-10-17T10:14:57.308Z
SHA-256 of the archived text: abf25ccb91d58020fee5364f6fcac231d9d199b97219e956fa93f4c22fe5b944
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How to cite

Cross-Spectral Reservoir Correlations as a Resource for Finite-Time Quantum Otto Engines — arXiv:2608.30496 — arXiv (en), https://arxiv.org/abs/2608.30496 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_ce116ff425f2 (Metraipolis archive dc_ce116ff425f2, sha256 abf25ccb91d58020fee5364f6fcac231d9d199b97219e956fa93f4c22fe5b944)

BibTeX

@misc{dcce116ff425f2,
  title = {Cross-Spectral Reservoir Correlations as a Resource for Finite-Time Quantum Otto Engines — arXiv:2608.30496},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.30496},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_ce116ff425f2; sha256 abf25ccb91d58020fee5364f6fcac231d9d199b97219e956fa93f4c22fe5b944},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.30496. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We investigate the thermodynamic consequences of longitudinal-transverse cross-spectral reservoir correlations in a finite-time quantum Otto engine with a two-level working medium. Each reservoir couples through excitation-relaxation and dephasing channels whose fluctuations are characterized by a Hermitian positive-semidefinite spectral-density matrix, with the off-diagonal elements encoding their cross correlations. The finite-time isochoric dynamics is derived within the second-order time-convolutionless framework, without imposing the Markov limit at the outset, so that finite reservoir-memory effects can enter through time-dependent dissipative and reservoir-induced coherent contributions. The resulting dynamics is then recast in Bloch-vector form to construct the stroke-resolved cycle dynamics. At fixed auto-spectral densities, cross-spectral correlations modify the populations and coherences of the working medium and thereby its thermodynamic performance. Increasing the correlation strength can enhance the output power, with the enhancement controlled by the cross-spectral phase and characteristic frequency scale. The correlations also reshape the transient cycle-to-cycle evolution and the approach to periodic operation, while the limit-cycle efficiency remains fixed at the Otto value for the population-preserving unitary strokes considered here. These results establish off-diagonal reservoir spectra as an additional resource for controlling finite-time quantum thermal machines.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-01 in quant-ph).
Categorie arXiv: Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2608.30496 — 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 2026-10-17T10:03:37.613Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-09-01?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).