Cooper-Pair Box Coupled to Two Resonators: An Architecture for a Quantum Refrigerator

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Abstract

Superconducting circuits present a promising platform with which to realize a quantum refrigerator. Motivated by this, we fabricate and perform spectroscopy of a gated Cooper-pair box, capacitively coupled to two superconducting coplanar-waveguide resonators with different frequencies. We experimentally demonstrate the strong coupling of a charge qubit to two superconducting resonators, with the ability to perform voltage driving of the qubit at gigahertz frequencies. We go on to discuss how the measured device could be modified to operate as a cyclic quantum refrigerator by terminating the resonators with normal-metal resistors acting as heat baths.

Original languageEnglish
Article number064022
Pages (from-to)1-12
Number of pages12
JournalPhysical Review Applied
Volume17
Issue number6
DOIs
Publication statusPublished - Jun 2022
MoE publication typeA1 Journal article-refereed

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