Quantum heat valve and entanglement in superconducting LC resonators

Quantum superconducting circuit with flexible coupler has been a powerful platform for designing quantum thermal machines. In this Letter, we employ the tunable coupling of two superconducting resonators to realize a heat valve by modulating magnetic flux using a superconducting quantum interference...

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Published inApplied physics letters Vol. 123; no. 14
Main Authors Liu, Yu-qiang, Yang, Yi-jia, Ma, Ting-ting, Yu, Chang-shui
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 02.10.2023
Subjects
Applied physics
Circuit design
Magnetic flux
Quantum entanglement
Resonators
Superconducting quantum interference devices
Superconductivity
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Summary:Quantum superconducting circuit with flexible coupler has been a powerful platform for designing quantum thermal machines. In this Letter, we employ the tunable coupling of two superconducting resonators to realize a heat valve by modulating magnetic flux using a superconducting quantum interference device. It is shown that a heat valve can be realized in a wide parameter range. We find a consistent relation between the heat current and quantum entanglement, which indicates the dominant role of entanglement on the heat valve. It provides an insightful understanding of quantum features in quantum heat machines.
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content type line 14
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0160675