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arXiv · 2004.02727

Distant spin entanglement via fast and coherent electron shuttling

Baptiste Jadot·Pierre-André Mortemousque·Emmanuel Chanrion·Vivien Thiney·Arne Ludwig·Andreas D. Wieck·Matias Urdampilleta·Christopher Bäuerle·Tristan Meunier
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Abstract

In the quest for large-scale quantum computing, networked quantum computers offer a natural path towards scalability. Now that nearest neighbor entanglement has been demonstrated for electron spin qubits in semiconductors, on-chip long distance entanglement brings versatility to connect quantum core units. Here we realize the controlled and coherent transfer of a pair of entangled electron spins, and demonstrate their remote entanglement when separated by a distance of 6 microns. Driven by coherent spin rotations induced by the electron displacement, high-contrast spin quantum interferences are observed and are a signature of the preservation of the entanglement all along the displacement procedure. This work opens the route towards fast on-chip deterministic interconnection of remote quantum bits in semiconductor quantum circuits.

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Baptiste Jadot, Pierre-André Mortemousque, Emmanuel Chanrion, Vivien Thiney, Arne Ludwig, Andreas D. Wieck, Matias Urdampilleta, Christopher Bäuerle, Tristan Meunier. 2020-04-06. Distant spin entanglement via fast and coherent electron shuttling. https://doi.org/10.1038/s41565-021-00846-y

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