Coherence properties of photons emitted by single defect centers in diamond

Details Coherence properties of photons emitted by single defect centers in diamond Coherence properties of photons emitted by single defect centers in diamond

2007-10-07

arxiv.org/abs/0710.1442v1

Physics

Quantum Physics

9 pages, 4 figures

Scientific paper

Photon interference among distant quantum emitters is a promising method to generate large scale quantum networks. Interference is best achieved when photons show long coherence times. For the nitrogen-vacancy defect center in diamond we measure the coherence times of photons via optically induced Rabi oscillations. Experiments reveal a close to Fourier transform (i.e. lifetime) limited width of photons emitted even when averaged over minutes. The projected contrast of two-photon interference (0.8) is high enough to envisage the applications in quantum information processing. We report 12 and 7.8 ns excited state lifetime depending on the spin state of the defect.

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