Suppression of photon shot noise dephasing in a tunable coupling superconducting qubit

Abstract

We demonstrate the suppression of photon shot noise dephasing in a superconducting qubit by eliminating its dispersive coupling to the readout cavity. This is achieved in a tunable coupling qubit, where the qubit frequency and coupling rate can be controlled independently. We observe that the coherence time approaches twice the relaxation time and becomes less sensitive to thermal photon noise when the dispersive coupling rate is tuned from several MHz to 22 kHz. This work provides a promising building block in circuit quantum electrodynamics that can hold high coherence and be integrated into larger systems.

References in corpus (13)

• Charge insensitive qubit design derived from the Cooper pair box
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• Detecting arbitrary quantum errors via stabilizer measurements on a sublattice of the surface code
• Controlling the spontaneous emission of a superconducting transmon qubit
• AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
• Generating Single Microwave Photons in a Circuit
• Qubit-photon interactions in a cavity: Measurement induced dephasing and number splitting
• Fast Reset and Suppressing Spontaneous Emission of a Superconducting Qubit
• Thermal and Residual Excited-State Population in a 3D Transmon Qubit
• Tunable coupling in circuit quantum electrodynamics with a superconducting V-system
• Photon Shot Noise Dephasing in the Strong-Dispersive Limit of Circuit QED
• A superconducting qubit with Purcell protection and tunable coupling
• Large Dispersive Shift of Cavity Resonance Induced by a Superconducting Flux Qubit in the Straddling Regime

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