Quantum Interference of Single Photons from Remote Nitrogen-Vacancy Centers in Diamond
2012; American Physical Society; Volume: 108; Issue: 14 Linguagem: Inglês
10.1103/physrevlett.108.143601
ISSN1092-0145
AutoresAlp Sipahigil, Michael Goldman, Emre Togan, Yiwen Chu, Matthew Markham, Daniel J. Twitchen, A. S. Zibrov, Alexander Kubanek, M. D. Lukin,
Tópico(s)Nonlinear Optical Materials Studies
ResumoWe demonstrate quantum interference between indistinguishable photons emitted by two nitrogen-vacancy centers in distinct diamond samples separated by two meters. Macroscopic solid immersion lenses are used to enhance photon collection efficiency. Quantum interference is verified by measuring a value of the second-order cross-correlation function g((2))(0)=0.35±0.04<0.5. In addition, optical transition frequencies of two separated nitrogen-vacancy centers are tuned into resonance with each other by applying external electric fields. An extension of the present approach to generate entanglement of remote solid-state qubits is discussed.
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