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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Nanooptik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Nanooptik | Publications | Deterministic and robust entanglement of nitrogen-vacancy centers using low-Q photonic-crystal cavities

Janik Wolters, Julia Kabuss, Andreas Knorr, and Oliver Benson (2014)

Deterministic and robust entanglement of nitrogen-vacancy centers using low-Q photonic-crystal cavities

Physical Review A, 89(060303(R)).

We propose an experiment to generate deterministic entanglement between separate nitrogen-vacancy (NV) centers mediated by the mode of a photonic crystal cavity. Using numerical simulations, the applicability and robustness of the entanglement operation to parameter regimes achievable with the present technology are investigated. We find that even with moderate cavity Q factors of 104 a concurrence of c>0.6 can be achieved within a time of tmax≈150 ns, while Q factors of 105 promise c>0.8. Most importantly, the investigated scheme is relatively insensitive to spectral diffusion and differences between the optical transition frequencies of the used NV centers. Link