Experimental demonstration of the treatment of time-dependent flux in circuit QED devices

ORAL

Abstract

The choice of allocation of external flux to inductive elements in circuit quantum-electrodynamics was long thought to be arbitrary, until recent theoretical work emphasized that this is not the case [1]. Without careful consideration there often arises an additional term in the time-dependent Hamiltonian proportional to $dPhi/dt$. Here we present an experimental demonstration of this theory using a fluxonium qubit and investigating the effects of fast flux ramps. Our data is consistent with theory which includes the additional time derivative term, validating the treatment of time-dependent flux in circuit quantization presented in [1].

[1] X. You, et. al, Phys. Rev. B (2019).

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Publication: Experimental verification of the treatment of time-dependent flux in circuit quantization; arXiv:2208.03738v1

Presenters

  • Jacob Bryon

    • Princeton University

Authors

  • Jacob Bryon

    • Princeton University

  • Daniel K Weiss

    • Yale University

  • Xinyuan You

    • Fermilab

  • Sara F Sussman

    • Princeton

  • Xanthe Croot

    • Princeton University

  • Ziwen Huang

    • Fermilab

  • Jens Koch

    • Northwestern University

  • Andrew A Houck

    • Princeton University