Coupled qubits as a quantum heat switch

Research output: Contribution to journalArticle


Research units

  • CNR-ENEA-EURATOM Association
  • Abdus Salam International Centre for Theoretical Physics


We present a quantum heat switch based on coupled superconducting qubits, connected to two LC resonators that are terminated by resistors providing two heat baths. To describe the system, we use a standard second order master equation with respect to coupling to the baths. We find that this system can act as an efficient heat switch controlled by the applied magnetic flux. The flux influences the energy level separations of the system, and under some conditions, the finite coupling of the qubits enhances the transmitted power between the two baths, by an order of magnitude under realistic conditions. At the same time, the bandwidth at maximum power of the switch formed of the coupled qubits is narrowed.


Original languageEnglish
Article number044007
Pages (from-to)1-9
JournalQuantum Science and Technology
Issue number4
Publication statusPublished - 1 Dec 2017
MoE publication typeA1 Journal article-refereed

    Research areas

  • heat transport, quantum heat switch, superconducting qubit

ID: 25727136