Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.143601
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Funding
- NSF
- CUA
- DARPA QUEST
- AFOSR MURI
- Packard Foundation
- Alexander von Humboldt Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [969816] Funding Source: National Science Foundation
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We demonstrate quantum interference between indistinguishable photons emitted by two nitrogen-vacancy centers in distinct diamond samples separated by two meters. Macroscopic solid immersion lenses are used to enhance photon collection efficiency. Quantum interference is verified by measuring a value of the second-order cross-correlation function g((2))(0) = 0.35 +/- 0.04 < 0.5. In addition, optical transition frequencies of two separated nitrogen-vacancy centers are tuned into resonance with each other by applying external electric fields. An extension of the present approach to generate entanglement of remote solid-state qubits is discussed.
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