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Two-photon quantum interference from separate nitrogen vacancy centers in diamond

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arxiv 1110.3329 v2 pith:VS2BXFW7 submitted 2011-10-14 quant-ph cond-mat.mes-hall

Hannes Bernien , Lilian Childress , Lucio Robledo , Matthew Markham , Daniel Twitchen , Ronald Hanson This is my paper · ORCID
classification quant-phcond-mat.mes-hall
keywords centersinterferencequantumdiamondemissionnitrogenpolarizationseparate
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We report on the observation of quantum interference of the emission from two separate nitrogen vacancy (NV) centers in diamond. Taking advantage of optically induced spin polarization in combination with polarization filtering, we isolate a single transition within the zero-phonon line of the non-resonantly excited NV centers. The time-resolved two-photon interference contrast of this filtered emission reaches 66%. Furthermore, we observe quantum interference from dissimilar NV centers tuned into resonance through the dc Stark effect. These results pave the way towards measurement-based entanglement between remote NV centers and the realization of quantum networks with solid-state spins.

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  1. Non-Gaussian Noise Magnetometry Using Local Spin Qubits

    quant-ph 2025-05 conditional novelty 6.0 of 10

    A single NV spin qubit and two-qubit coincidence or Bell-state echoes can isolate fourth-order magnetic noise cumulants, demonstrated on telegraph-noise and critical Ising models.

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