Open AccessAchieving maximum entanglement between two nitrogen-vacancy centers coupling to a whispering-gallery-mode microresonator
Author(s) -
Siping Liu,
Jiahua Li,
Rong Yu,
Ying Wu
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.003501
Subject(s) - quantum entanglement , whispering gallery wave , resonator , physics , cavity quantum electrodynamics , diamond , coupling (piping) , quantum optics , optics , quantum , quantum mechanics , materials science , open quantum system , metallurgy , composite material
We investigate the entanglement generation between two nitrogen-vacancy (NV) centers in diamond nanocrystal coupled to a high-Q counterpropagating twin whispering-gallery modes (WGMs) of a microtoroidal resonator. For looking into the degree and dynamics of the entanglement, we calculate the concurrence using the microscopic master equation approach. The influences of the coupling strength between the WGMs (or the size of the two spherical NV centers), the distance between two NV centers, the frequency detuning between the NV center and microresonator, and the initial state of the system on the dynamics of concurrence are discussed in detail. It is found that the maximum entanglement between the two NV centers can be created by properly adjusting these controllable system parameters. Our results may provide further insight into future solid-state cavity quantum electrodynamics (CQED) system for quantum information engineering.