[19a-A24-1~10] KS.1 Solid State Quantum Sensor Group

9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[19a-A24-3] Effects of decoherence on the sensitivity of quantum sensor based on entangled NV pair.

〇(D)Kosuke Kimura^1,2, Shinobu Onoda^2,3, Shunsuke Daimon², Wataru Kada⁴, Tokuyuki Teraji^3,5, Junichi Isoya⁶, Tomoya Hasunuma¹, Ikki Shingai¹, Airi Kawasaki¹, Osamu Hanaizumi¹, Takeshi Ohshima² (1.Gunma Univ., 2.QST, 3.YNU-QIC, 4.Tohoku univ., 5.NIMS, 6.Univ. of Tsukuba)

Keywords:

NV center,entanglement,decoherence

The sensitivity of quantum sensor based on entangled states has the potential to beyond the standard quantum limit (SQL). We have researched the sensing based on entangled states between NV centers in diamond. However, entangled states are susceptible to decoherence, and it is not clear whether the SQL can be beyond in a real noisy environment. In this study, we consider static magnetic field fluctuations and thermal fluctuations of the local Overhauser field and discuss the effect of decoherence on the sensitivity.