Dependence of 3D Cavity Lifetime on Magnetic Field

ORAL

Abstract

In 3D circuit quantum electrodynamics, 3D cavities are often used as storage for quantum information for their relatively long lifetimes. Nonetheless, it would be desirable to further extend the cavity lifetime by determining which of the various loss phenomena limits the cavity performance. One loss mechanism known to contribute loss to some systems [1] arises from trapped magnetic flux in the form of superconducting vortices. Indirect evidence from past experiments suggests that ambient magnetic field near the cavity suppresses its superconductivity and reduces its lifetime. To determine whether ambient magnetic field is limiting the 3D cavity lifetime, we study the dependence of 3D cavity lifetime on an externally applied magnetic field; additionally, we compare the performance of a coaxial stub 3D cavity with that of a rectangular 3D cavity. [1] C. Song, T.W. Heitmann, M.P. Defeo, K. Yu, R. Mcdermott, M. Neeley, J.M. Martinis, and B.L.T. Plourde, Physical Review B 79, (2009).

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Presenters

  • Kaicheng Li

    Physics and Applied Physics, Yale University

Authors

  • Kaicheng Li

    Physics and Applied Physics, Yale University

  • Christopher Axline

    Physics and Applied Physics, Yale University, Applied Physics, Yale University, Dept. of Applied Physics, Yale University, Department of Applied Physics, Yale Univ

  • Teresa Brecht

    Physics and Applied Physics, Yale University, Departments of Applied Physics and Physics, Yale University & HRL

  • Luigi Frunzio

    Yale University, Applied Physics, Yale University, Physics and Applied Physics, Yale University, Applied Physics, Yale Univ, Dept. of Applied Physics, Yale University, Department of Applied Physics, Yale Univ, Yale Univ, Departments of Applied Physics and Physics, Yale University

  • Leonid Glazman

    Applied Physics, Yale University, Physics and Applied Physics, Yale University, Yale University, Department of Physics, Yale University

  • Robert Schoelkopf

    Yale University, Applied Physics, Yale University, Physics and Applied Physics, Yale University, Applied Physics, Yale Univ, Dept. of Applied Physics, Yale University, Departments of Applied Physics and Physics, Yale University