Temporal coherence of photons emitted by single nitrogen-vacancy defect centers in diamond using optical rabi-oscillations

A. Batalov*, C. Zierl, T. Gaebel, P. Neumann, I. Y. Chan, G. Balasubramanian, P. R. Hemmer, F. Jelezko, J. Wrachtrup

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    133 Citations (Scopus)

    Abstract

    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 applications in quantum information processing. We report 12 and 7.8 ns excited state lifetimes depending on the spin state of the defect.

    Original languageEnglish
    Article number077401
    JournalPhysical Review Letters
    Volume100
    Issue number7
    DOIs
    Publication statusPublished - 28 Feb 2008

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