Quantum metrology with time-dependent Hamiltonians

ORAL

Abstract

I will give an overview of recent results [1,2,3] in generalizing the theory of quantum metrology to the situation when the Hamiltonian is time dependent. In the general case, optimal precision requires coherent control of the system, together with adaptive feedback. When these ingredients are combined, we will show that existing bounds for the precision using time-independent Hamiltonians can be broken. Application to precisions frequency measurements will be discussed.

[1] S. Pang, A. N. Jordan, Nature Communications 8, 14695 (2017)
[2] J. Yang, S. Pang, A. N. Jordan, Phys. Rev. A 96, 020301(R) (2017)
[3] A. N. Jordan, Science 356, 802 (2017)

*We acknowledge research support from NSF grant DMR-1506081 and ARO grant No. W911NF-15-1-0496.

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Presenters

  • Andrew Jordan

    • University of Rochester
    • Department of Physics and Astronomy, Univ of Rochester
    • Department of Physics and Astromony, University of Rochester
    • Univ of Rochester
    • Department of physics and astronomy, Univ of Rochester
    • Physics and Astronomy, University of Roshester
    • Physics, Univ of Rochester

Authors

  • Andrew Jordan

    • University of Rochester
    • Department of Physics and Astronomy, Univ of Rochester
    • Department of Physics and Astromony, University of Rochester
    • Univ of Rochester
    • Department of physics and astronomy, Univ of Rochester
    • Physics and Astronomy, University of Roshester
    • Physics, Univ of Rochester

  • Shengshi Pang

    • University of Rochester
    • Department of Physics and Astromony, University of Rochester
    • Univ of Rochester

  • Jing Yang

    • Department of Physics and Astronomy, Univ of Rochester
    • Univ of Rochester