Simultaneous bistability of a qubit and resonator in circuit quantum electrodynamics

Overview

We studied the joint activated dynamics exhibited by two quantum degrees of freedom: a cavity mode oscillator which is strongly coupled to a superconducting qubit in the strongly coherently driven dispersive regime. Dynamical simulations and complementary measurements show a range of parameters where both the cavity and the qubit exhibit sudden simultaneous switching between two metastable states.

This manifests in ensemble averaged amplitudes of both the cavity and qubit exhibiting a partial coherent cancellation. Transmission measurements of driven microwave cavities coupled to transmon qubits show detailed features which agree with the theory in the regime of simultaneous switching.

Team

Investigators

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Matthew Elliott

Investigator

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Eran Ginossar

Investigator

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P. J. Leek

Investigator

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Th. K. Mavrogordatos

Investigator

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A. Patterson

Investigator

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M. J. Peterer

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J. Rahamim

Investigator

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M. H. Szymanska

Investigator

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G. Tancredi

Investigator