Microwave-to-optical frequency conversion using a cesium atom coupled to a superconducting resonator

Bryan T. Gard, Kurt Jacobs, R. McDermott, and M. Saffman
Phys. Rev. A 96, 013833 – Published 18 July 2017

Abstract

A candidate for converting quantum information from microwave to optical frequencies is the use of a single atom that interacts with a superconducting microwave resonator on one hand and an optical cavity on the other. The large electric dipole moments and microwave transition frequencies possessed by Rydberg states allow them to couple strongly to superconducting devices. Lasers can then be used to connect a Rydberg transition to an optical transition to realize the conversion. Since the fundamental source of noise in this process is spontaneous emission from the atomic levels, the resulting control problem involves choosing the pulse shapes of the driving lasers so as to maximize the transfer rate while minimizing this loss. Here we consider the concrete example of a cesium atom, along with two specific choices for the levels to be used in the conversion cycle. Under the assumption that spontaneous emission is the only significant source of errors, we use numerical optimization to determine the likely rates for reliable quantum communication that could be achieved with this device. These rates are on the order of a few megaqubits per second.

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  • Received 10 May 2017

DOI:https://doi.org/10.1103/PhysRevA.96.013833

©2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & Optical

Authors & Affiliations

Bryan T. Gard1,2,*, Kurt Jacobs1,2,3, R. McDermott4, and M. Saffman4

  • 1U.S. Army Research Laboratory, Computational and Information Sciences Directorate, Adelphi, Maryland 20783, USA
  • 2Hearne Institute for Theoretical Physics, Louisiana State University, Baton Rouge, Louisiana 70803, USA
  • 3Department of Physics, University of Massachusetts at Boston, Boston, Massachusetts 02125, USA
  • 4Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA

  • *bryantgard1@gmail.com

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Issue

Vol. 96, Iss. 1 — July 2017

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