Supremacy of incoherent sudden cycles

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Supremacy of incoherent sudden cycles. / Pekola, Jukka P.; Karimi, Bayan; Thomas, George; Averin, Dmitri V.

In: Physical Review B, Vol. 100, No. 8, 085405, 06.08.2019, p. 1-5.

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@article{2a6414bb195e4659b62076fe63ab458b,
title = "Supremacy of incoherent sudden cycles",
abstract = "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.",
author = "Pekola, {Jukka P.} and Bayan Karimi and George Thomas and Averin, {Dmitri V.}",
note = "| openaire: EC/H2020/742559/EU//SQH | openaire: EC/H2020/766025/EU//QuESTech",
year = "2019",
month = "8",
day = "6",
doi = "10.1103/PhysRevB.100.085405",
language = "English",
volume = "100",
pages = "1--5",
journal = "Physical Review B (Condensed Matter and Materials Physics)",
issn = "2469-9950",
publisher = "American Physical Society",
number = "8",

}

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TY - JOUR

T1 - Supremacy of incoherent sudden cycles

AU - Pekola, Jukka P.

AU - Karimi, Bayan

AU - Thomas, George

AU - Averin, Dmitri V.

N1 - | openaire: EC/H2020/742559/EU//SQH | openaire: EC/H2020/766025/EU//QuESTech

PY - 2019/8/6

Y1 - 2019/8/6

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85070681835&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.100.085405

DO - 10.1103/PhysRevB.100.085405

M3 - Article

VL - 100

SP - 1

EP - 5

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

SN - 2469-9950

IS - 8

M1 - 085405

ER -

ID: 36257804