Cavity-Assisted Quantum Bath Engineering

K. W. Murch, U. Vool, D. Zhou, S. J. Weber, S. M. Girvin, and I. Siddiqi
Phys. Rev. Lett. 109, 183602 – Published 31 October 2012
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Abstract

We demonstrate quantum bath engineering for a superconducting artificial atom coupled to a microwave cavity. By tailoring the spectrum of microwave photon shot noise in the cavity, we create a dissipative environment that autonomously relaxes the atom to an arbitrarily specified coherent superposition of the ground and excited states. In the presence of background thermal excitations, this mechanism increases state purity and effectively cools the dressed atom state to a low temperature.

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  • Received 16 July 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.183602

© 2012 American Physical Society

Authors & Affiliations

K. W. Murch1,*, U. Vool2, D. Zhou2, S. J. Weber1, S. M. Girvin2, and I. Siddiqi1

  • 1Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA
  • 2Department of Physics, Yale University, New Haven, Connecticut 06520-8120, USA

  • *katerm@berkeley.edu

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Issue

Vol. 109, Iss. 18 — 2 November 2012

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