Direct Observation of Josephson Capacitance

Abstract

The effective capacitance has been measured in the split Cooper pair box (CPB) over its phase-gate bias plane. Our low-frequency reactive measurement scheme allows to probe purely the capacitive susceptibility due to the CPB band structure. The data are quantitatively explained using parameters determined independently by spectroscopic means. In addition, we show in practice that the method offers an efficient way to do non-demolition readout of the CPB quantum state.

4 pages

References in corpus (14)

• Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• Quantum state engineering with Josephson-junction devices
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
• Nonequilibrium quasiparticles and $2e$ periodicity in single-Cooper-pair transistors
• Coherent dynamics of a Josephson charge qubit
• Variable electrostatic transformer: controllable coupling of two charge qubits
• Observation of quantum capacitance in the Cooper-pair transistor
• Charge Transfer Induced Persistent Current and Capacitance Oscillations
• "Superconductor-Insulator transition" in a single Josephson junction
• Landau-Zener interferometry for qubits
• The Inductive Single-Electron Transistor (L-SET)
• Quantum capacitive phase detector

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• Splitting a single Cooper-pair with microwave light
• Current-Phase Relation and Josephson Inductance of Superconducting Cooper Pair Transistor
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