Presentation Information

5:15 PM - 5:30 PM JST(8:15 AM - 8:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9p-F212-14]Improved fidelity of deterministic Bell-state measurement between an electron spin and a nitrogen nuclear spin in a diamond NV center

〇Taichi Fujiwara¹, Masataka Aoki¹, Taisei Matsushima¹, Yuhei Sekiguchi^1,3,4, Toshiharu Makino^2,3,4, Kato Hiromitsu^2,3,4, Hideo Kosaka^1,3,4 (1.Grad. Sch. Eng., Yokohama Natl. Univ., 2.AIST, 3.QIC Yokohama Natl. Univ., 4.IAS, Yokohama Natl. Univ.)

Keywords:

Diamond,Color center,Quantum communication

Toward quantum repeaters based on diamond NV centers under zero field, we improved the fidelity of deterministic Bell-state measurement between an electron spin and a nitrogen nuclear spin. By enhancing the photon collection efficiency through solid immersion lens fabrication, an average Bell-state measurement fidelity of 75% was achieved. We also analyze the factors limiting the fidelity and discuss the potential for further improvement through repeated readout.

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