RQC Seminar

121st RQC Seminar

  • Speaker

    Mr. Trip Thripsuwan
    ( Chiang Mai University, Thailand )

  • Date

    14:00-15:00, June 3, 2024 (Monday)

  • Venue

    Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room/ 研究本館3階 セミナー室(345-347) C01）

  • Title

    Continuous measurement and control of Nitrogen-Vacancy Center for Magnetic field Sensing

  • Inquiries

    rqc_info[at]ml.riken.jp

Abstract
Quantum continuous measurement and feedback can be utilized for applications in quantum metrology. We theoretically investigate the possibility of using a Nitrogen-Vacancy (NV) Center as a magnetic field sensor. By using a technique of coherent population trapping in selected three energy levels of the NV center proposed in S. H. Wu, PRA (2021), we can prepare a dark state and let the fluctuating magnetic field disturb and induce the population in the excited state, which can be used for the readout. We numerically simulate quantum trajectories of the NV Center state conditioned on continuous readouts of the excited state population and explore Bayesian estimation and feedback protocols for improving the quality of magnetic field sensing.



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