Supremacy of incoherent sudden cycles

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Stony Brook University

Kuvaus

We investigate theoretically a refrigerator based on a two-level system (TLS) coupled alternately to two different heat baths. Modulation of the coupling is achieved by tuning the level spacing of the TLS. We find that the TLS, which avoids quantum coherences, creates finite cooling power for one of the baths in sudden cycles, i.e., acts as a refrigerator even in the limit of infinite operation frequency. By contrast, the cycles that create quantum coherence in the sudden expansions and compressions lead to heating of both the baths. We propose a driving method that avoids creating coherence and thus restores the cooling in this system. We also discuss a physical realization of the cycle based on a superconducting qubit coupled to dissipative LC resonators.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli085405
Sivut1-5
JulkaisuPhysical Review B
Vuosikerta100
Numero8
TilaJulkaistu - 6 elokuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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