Coupling of diamond nanocrystals to a high-Q whispering-gallery microresonator

被引：23
作者：
Yu, Xiao-Chong [1 ]
Liu, Yong-Chun [1 ]
Yan, Meng-Yuan [1 ]
Jin, Wei-Liang [1 ]
Xiao, Yun-Feng [1 ]
机构：
[1] Peking Univ, Sch Phys, State Key Lab Artificial Microstruct & Mesoscop P, Beijing 100871, Peoples R China
来源：
PHYSICAL REVIEW A | 2012年 / 86卷 / 04期
基金：
中国国家自然科学基金;
关键词：
SINGLE-SPIN; QUANTUM; SPECTROSCOPY; ENTANGLEMENT; ATOMS;
D O I：
10.1103/PhysRevA.86.043833
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We theoretically investigate a cavity quantum electrodynamics system in which a high-Q whispering-gallery-mode (WGM) microresonator interacts with multiple diamond nanocrystals each containing a single nitrogen-vacancy (NV) center. With a tapered fiber waveguide coupling the WGMs, the transmission spectrum of the system exhibits a twofold-splitting phenomenon, where the first fold of splitting originates from the nanocrystals' Rayleigh scattering and the second fold stems from the NV center dipole coupling with the WGMs. The interacting system can serve as a platform to generate quantum entanglement between two NV centers embedded in distant diamond nanocrystals. Our further study reveals that the Rayleigh scattering of the nanocrystals plays a positive role in generating entanglement in some cases. The analytical results show that the relatively strong scattering leads to a larger concurrence for the fixed dipole-cavity detunings. This investigation may hold potential for solid-state quantum information processing applications.
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页数：8
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