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Optical Entanglement of Distinguishable Quantum Emitters

Levonian, D. S. and Riedinger, R. and Machielse, B. and Knall, E. N. and Bhaskar, M. K. and Knaut, C. M. and Bekenstein, R. and Park, H. and Lončar, M. and Lukin, M. D. (2022) Optical Entanglement of Distinguishable Quantum Emitters. Physical Review Letters, 128 (21). Art. No. 213602. ISSN 0031-9007. doi:10.1103/physrevlett.128.213602.

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Solid-state quantum emitters are promising candidates for the realization of quantum networks, owing to their long-lived spin memories, high-fidelity local operations, and optical connectivity for long-range entanglement. However, due to differences in local environment, solid-state emitters typically feature a range of distinct transition frequencies, which makes it challenging to create optically mediated entanglement between arbitrary emitter pairs. We propose and demonstrate an efficient method for entangling emitters with optical transitions separated by many linewidths. In our approach, electro-optic modulators enable a single photon to herald a parity measurement on a pair of spin qubits. We experimentally demonstrate the protocol using two silicon-vacancy centers in a diamond nanophotonic cavity, with optical transitions separated by 7.4 GHz. Working with distinguishable emitters allows for individual qubit addressing and readout, enabling parallel control and entanglement of both colocated and spatially separated emitters, a key step toward scaling up quantum information processing systems.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper Information
Levonian, D. S.0000-0002-5443-992X
Riedinger, R.0000-0002-0187-2332
Machielse, B.0000-0003-2940-7843
Knall, E. N.0000-0002-7830-1570
Bhaskar, M. K.0000-0002-8475-4613
Knaut, C. M.0000-0003-2720-4452
Bekenstein, R.0000-0002-3342-7700
Park, H.0000-0001-9576-8829
Lončar, M.0000-0002-5029-5017
Lukin, M. D.0000-0002-8658-1007
Additional Information:© 2022 American Physical Society. (Received 23 August 2021; accepted 21 March 2022; published 23 May 2022) We thank Pavel Stroganov, Eric Bersin, Leigh Martin, and Neil Sinclair for discussions, Vikas Anant from PhotonSpot for providing SNSPDs, and Jim MacArthur for assistance with electronics. This work was supported by the NSF, Center for Ultracold Atoms, Award No. 1734011, Department of Defense Army Research Office Defense University Research Instrumentation Program, Air Force Office of Scientific Research Multidisciplinary University Research Initiatives, Office of Naval Research MURI, Army Research Lab, and a Vannevar Bush Faculty Fellowship. Devices were fabricated in the Harvard University Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Coordinated Infrastructure Network (NNCI), which is supported by the National Science Foundation under NSF Award No. 1541959. M. K. B. and D. S. L. acknowledge support from an National Defense Science and Engineering Fellowship. R. R. acknowledges support from the Alexander von Humboldt Foundation and the Cluster of Excellence “Advanced Imaging of Matter” of the Deutsche Forschungsgemeinschaft (DFG)—EXC 2056—Project No. 390715994. B. M. and E. N. K. acknowledge that this material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE1745303. D. S. L., R. R., and B. M. contributed equally to this work.
Funding AgencyGrant Number
Army Research Office (ARO)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Office of Naval Research (ONR)UNSPECIFIED
Army Research LaboratoryUNSPECIFIED
Vannever Bush Faculty FellowshipUNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)EXC 2056 - 390715994
NSF Graduate Research FellowshipDGE-1745303
Issue or Number:21
Record Number:CaltechAUTHORS:20220601-257758000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114992
Deposited By: George Porter
Deposited On:01 Jun 2022 22:17
Last Modified:01 Jun 2022 22:17

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