Investigating Measurement-Induced State Transitions in a Transmon due to Bifurcation-based Readout

ORAL

Abstract

Measurement-induced state transitions (MIST) in transmons limit both the fidelity and quantum non-demolition (QND) character of the measurement. In this work, we investigate MIST in a bifurcation-based readout of the transmon using a dispersively coupled, weakly anharmonic resonator [1,2]. In this scheme, the qubit state is mapped onto either a vacuum or a high-amplitude coherent state. We explore whether this approach alters the MIST dynamics and improves QND performance compared to conventional dispersive readout.

[1] Krantz et al., Nat. Commun. (2016)

[2] Royer et al., Sci. Adv. (2018)

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Presenters

  • Harshvardhan Kiran Babla

    • Yale University

Authors

  • Harshvardhan Kiran Babla

    • Yale University

  • Qile Su

    • Yale University

  • Thomas B Smith

    • Yale University

  • Shruti Puri

    • Yale University