Fock State Generator

ORAL

Abstract

Using a single junction Al/AlO$_\text{x}$/Al transmon qubit coupled to a superconducting Al cavity (at a temperature 15 mK), we have used a Raman technique to produce a single Fock state in the cavity. The technique requires 3 microwave tones to drive the system from the ground state of the cavity/qubit system. We achieve an experimental fidelity of the final Fock state of around 90\%, limited by thermal photons in the cavity and by decay during the operation time. Using this technique, we have also generated an arbitrary superposition of Fock states and a superposition of qubit and cavity states. Results, simulations and applications of this technique will be discussed.

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Authors

  • Shavindra Premaratne

    Department of Physics, University of Maryland; Laboratory for Physical Sciences

  • F.C. Wellstood

    Department of Physics, University of Maryland, College Park, MD and Joint Quantum Institute, University of Maryland, College Park, JQI, CNAM, Department of Physics, University of Maryland

  • Benjamin Palmer

    Laboratory for Physical Sciences, College Park, MD and Department of Physics, University of Maryland, College Park, MD, Department of Physics, University of Maryland; Laboratory for Physical Sciences, Laboratory of Physical Sciences, College Park