Performance boost of a collective qutrit refrigerator
Performance boost of a collective qutrit refrigerator
Abstract
A single qutrit with transitions selectively driven by weakly-coupled reservoirs can implement one of the world's smallest refrigerators. We analyze the performance of N such fridges that are collectively coupled to the reservoirs. We observe a quantum boost, manifest in a quadratic scaling of the steady-state cooling current with N. As N grows further, the scaling reduces to linear, since the transitions responsible for the quantum boost become energetically unfavorable. Fine-tuned inter-qutrit interactions may be used to maintain the quantum boost for all N and also for not-perfectly collective scenarios.
Keywords: open quantum systems; Lindblad equation; Redfield equation; collective effects; quantum absorption refrigerator; qutrits; Holstein-Primakoff transform; quadratic boost; nonequilibrium steady state
-
WWW-Beitrag
arXiv:2210.07844 [quant-ph]: https://arxiv.org/abs/2210.07844
DOI: 10.48550/arXiv.2210.07844 -
Physical Review Applied 19(2023), 034023
DOI: 10.1103/PhysRevApplied.19.034023
Cited 8 times in Scopus
Downloads
- Open Access Version von arxiv.org
- Zweitveröffentlichung erwartet
Permalink: https://www.hzdr.de/publications/Publ-35273