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arXiv · 2011.02623

Efficient entanglement of spin qubits mediated by a hot mechanical oscillator

Emma Rosenfeld·Ralf Riedinger·Jan Gieseler·Martin Schuetz·Mikhail D. Lukin
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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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Emma Rosenfeld, Ralf Riedinger, Jan Gieseler, Martin Schuetz, Mikhail D. Lukin. 2020-11-05. Efficient entanglement of spin qubits mediated by a hot mechanical oscillator. https://doi.org/10.1103/physrevlett.126.250505

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