RFSQUID-Mediated Coherent Tunable Coupling Between a Superconducting Phase Qubit and a Lumped Element Resonator

Published

April 29, 2010

Author(s)

Michael S. Allman, Fabio Altomare, Jed D. Whittaker, Katarina Cicak, Dale Li, Adam J. Sirois, Joshua Strong, John D. Teufel, Raymond W. Simmonds

Abstract

We demonstrate coherent tunable coupling between a superconducting phase qubit and a lumpedelement resonator. The coupling strength is mediated by a flux-biased rf SQUID operated in the nonhysteretic regime. By tuning the applied flux bias to the rf SQUID we change the effective mutual inductance, and thus the coupling energy, between the phase qubit and resonator. We verify the modulation of coupling strength from 0 to 100 MHz by observing modulation in the size of the splitting in the phase qubit s spectroscopy, as well as coherently by observing modulation in the vacuum Rabi oscillation frequency when on resonance. The measured spectroscopic splittings and vacuum Rabi oscillations agree well with theoretical predictions.

Citation

Physical Review

Volume

104

Issue

17

Pub Type

Journals

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Citation

Allman, M. , Altomare, F. , Whittaker, J. , Cicak, K. , Li, D. , Sirois, A. , Strong, J. , Teufel, J. and Simmonds, R. (2010), RFSQUID-Mediated Coherent Tunable Coupling Between a Superconducting Phase Qubit and a Lumped Element Resonator, Physical Review, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904788 (Accessed December 26, 2024)