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Efficient Entanglement of Spin Qubits Mediated by a Hot Mechanical Oscillator

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [3];  [2]
  1. Harvard Univ., Cambridge, MA (United States); OSTI
  2. Harvard Univ., Cambridge, MA (United States)
  3. Amazon Quantum Solutions Lab, Seattle, Washington, D.C. (United States); AWS Center for Quantum Computing, Pasadena, CA (United States)
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.
Research Organization:
Stanford University, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0020115
OSTI ID:
1853457
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 126; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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