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Efficient Entanglement of Spin Qubits Mediated by a Hot Mechanical Oscillator

Rosenfeld, Emma and Riedinger, Ralf and Gieseler, Jan and Schuetz, Martin and Lukin, Mikhail D. (2021) Efficient Entanglement of Spin Qubits Mediated by a Hot Mechanical Oscillator. Physical Review Letters, 126 (25). Art. No. 250505. ISSN 0031-9007.

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Localized electronic and nuclear spin qubits in the solid state constitute a promising platform for storage and manipulation of quantum information, even at room temperature. However, the development of scalable systems requires the ability to entangle distant spins, which remains a challenge today. We propose and analyze an efficient, heralded scheme that employs a parity measurement in a decoherence free subspace to enable fast and robust entanglement generation between distant spin qubits mediated by a hot mechanical oscillator. We find that high-fidelity entanglement at cryogenic and even ambient temperatures is feasible with realistic parameters and show that the entangled pair can be subsequently leveraged for deterministic controlled-NOT operations between nuclear spins. Our results open the door for novel quantum processing architectures for a wide variety of solid-state spin qubits.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Riedinger, Ralf0000-0002-0187-2332
Gieseler, Jan0000-0003-1011-5269
Lukin, Mikhail D.0000-0002-8658-1007
Additional Information:© 2021 American Physical Society. (Received 5 November 2020; accepted 29 April 2021; published 24 June 2021) We would like to thank S. Hofer for insightful discussions and Samantha Dakoulas for assistance during this project. The authors thank C. Maxwell for design assistance with Figs. 1 and 2. This work was supported by NSF, CUA, ARO MURI, and V. Bush Faculty Fellowship. R. R. was supported by the Alexander von Humboldt Foundation. This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grants No. DGE1144152 and No. DGE1745303. This work was supported by DOE, Grant No. DE-SC0020115. Any opinion, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
Group:AWS Center for Quantum Computing
Funding AgencyGrant Number
Harvard-MIT Center for Ultracold AtomsUNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Vannever Bush Faculty FellowshipUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
NSF Graduate Research FellowshipDGE-1144152
NSF Graduate Research FellowshipDGE-1745303
Department of Energy (DOE)DE-SC0020115
Issue or Number:25
Record Number:CaltechAUTHORS:20210626-222733649
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109614
Deposited By: George Porter
Deposited On:28 Jun 2021 16:45
Last Modified:28 Jun 2021 16:45

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