[8p-C310-1~13] KS.1 Solid State Quantum Sensor Group

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[8p-C310-4] Theoretical Analysis and Characterization of the Robustness of Signal Amplitude to Common-Mode Detuning in Double Quantum 4-Ramsey Sensing

〇Yuta Araki¹, Takeharu Sekiguchi¹, Yuji Hatano¹, Chikara Shinei^2,3, Masashi Miyakawa³, Takashi Taniguchi³, Tokuyuki Teraji³, Hiroshi Abe⁴, Shinobu Onoda⁴, Takeshi Ohshima⁴, Takayuki Shibata⁵, Mutsuko Hatano¹, Takayuki Iwasaki¹ (1.Science Tokyo, 2.Univ. of Tsukuba, 3.NIMS, 4.QST, 5.DENSO CORPORATION)

Keywords:

NV center,Diamond

The Double-Quantum (DQ) 4-Ramsey protocol is widely used as a de facto standard technique for high-sensitivity magnetic field sensing with NV centers because of its robustness against common-mode frequency shifts, such as those induced by temperature fluctuations. In this work, we derive an analytical expression for the DQ 4-Ramsey signal using a Hamiltonian that incorporates microwave detuning during pulse application. Experimental measurements further demonstrate that, although the signal phase remains robust against variations in Δc, the signal amplitude exhibits a pronounced dependence on Δc.