Hannes Bernien, Lilian Childress, Lucio Robledo, Matthew Markham, Daniel Twitchen, Ronald Hanson
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.
View original:
http://arxiv.org/abs/1110.3329
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