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

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 GHz 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.

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• Cyclic solid-state quantum battery: Thermodynamic characterization and quantum hardware simulation
• Numerically "exact" simulations of a quantum Carnot cycle: Analysis using thermodynamic work diagrams
• Dicke superradiant enhancement of the heat current in circuit QED
• Fluctuations and stability of a fast driven Otto cycle
• Applications of Superconductor-Normal Metal Interfaces
• Dephasing in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator
• Quantum heat valve and entanglement in superconducting $LC$ resonators
• Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe
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• Quantum heat engine based on quantum interferometry: the SU(1,1) Otto cycle
• Full counting statistics and first-passage times in quantum Markovian processes: Ensemble relations, metastability, and fluctuation theorems
• Singular transport in non-equilibrium strongly internal-coupled 1D tilted field spin-1/2 chain
• Thermodynamic and energetic constraints on transition probabilities of small-scale quantum systems
• Dynamical phase and quantum heat at fractional frequencies
• Quantum circuit refrigerator based on quantum dots coupled to normal-metal and superconducting electrodes
• Reservoir-Engineered Mechanical Cat States with a Driven Qubit
• Photonic heat transport from weak to strong coupling