Efficient entanglement of spin qubits mediated by a hot mechanical oscillator

• URL: http://arxiv.org/abs/2011.02623v1
• Date: Thu, 5 Nov 2020 02:30:18 GMT
• Title: Efficient entanglement of spin qubits mediated by a hot mechanical oscillator
• Authors: Emma Rosenfeld, Ralf Riedinger, Jan Gieseler, Martin Schuetz, Mikhail D. Lukin
• Abstract summary: Localized electronic and nuclear spin qubits in the solid state constitute a promising platform for storage and manipulation of quantum information. We propose and analyze a scheme that employs a parity measurement in a decoherence free subspace to enable fast and robust entanglement generation. 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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