Surprises in reservoir-engineering approaches to spin-squeezing

ORAL

Abstract

Spin-squeezed states can be useful in metrological applications as they allow for sensing beyond the standard quantum limit. In recent years, a variety of mechanisms for generating such states have been proposed theoretically, as well as in some cases, realized experimentally. In this talk, we revisit the theory of dissipative protocols, where appropriately engineered noise processes can be utilized for spin-squeezing generation [1][2]. In the Markovian limit, we analyze the surprising consequences of single-spin dephasing and relaxation, and outline optimized mitigation strategies. We also analyze a non-Markovian regime directly relevant to realizations where an NV center spin ensemble is coupled to a mechanical mode.
[1] Agarwal and Puri, Phys. Rev. A 41, 3782 (1990).
[2] Dalla Torre, E. G., et al., Phys. Rev. Lett. 110, 120402 (2013)

*This work was supported by the DARPA DRINQS program

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Presenters

  • Peter Groszkowski

    • Pritzker School of Molecular Engineering, University of Chicago
    • University of Chicago

Authors

  • Peter Groszkowski

    • Pritzker School of Molecular Engineering, University of Chicago
    • University of Chicago

  • Hoi-Kwan Lau

    • Simon Fraser Univ
    • Dept of Physics, Simon Fraser University
    • Simon Fraser University

  • Martin Koppenhoefer

    • Pritzker School of Molecular Engineering, University of Chicago
    • University of Chicago
    • University of Basel

  • Aashish Clerk

    • Pritzker School of Molecular Engineering, University of Chicago
    • University of Chicago
    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA