Quantum-circuit Refrigerator

Kuan Tan, Matti Partanen, Russell Lake, Joonas Govenius, Shumpei Masuda, Mikko Möttönen

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

54 Sitaatiot (Scopus)
159 Lataukset (Pure)

Abstrakti

Quantum technology promises revolutionizing applications in information processing, communications, sensing and modelling. However, efficient on-demand cooling of the functional quantum degrees of freedom remains challenging in many solid-state implementations, such as superconducting circuits. Here we demonstrate direct cooling of a superconducting resonator mode using voltage-controllable electron tunnelling in a nanoscale refrigerator. This result is revealed by a decreased electron temperature at a resonator-coupled probe resistor, even for an elevated electron temperature at the refrigerator. Our conclusions are verified by control experiments and by a good quantitative agreement between theory and experimental observations at various operation voltages and bath temperatures. In the future, we aim to remove spurious dissipation introduced by our refrigerator and to decrease the operational temperature. Such an ideal quantum-circuit refrigerator has potential applications in the initialization of quantum electric devices. In the superconducting quantum computer, for example, fast and accurate reset of the quantum memory is needed.
AlkuperäiskieliEnglanti
Artikkeli15189
Sivut1-8
JulkaisuNature Communications
Vuosikerta8
DOI - pysyväislinkit
TilaJulkaistu - 8 toukokuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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