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)

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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