Quantum repeaters based on individual electron spins and nuclear-spin-ensemble memories in quantum dots

• URL: http://arxiv.org/abs/2010.13863v4
• Date: Tue, 26 Oct 2021 02:32:37 GMT
• Title: Quantum repeaters based on individual electron spins and nuclear-spin-ensemble memories in quantum dots
• Authors: Kenneth Sharman, Faezeh Kimiaee Asadi, Stephen C Wein, Christoph Simon
• Abstract summary: We propose a quantum repeater scheme that combines individual quantum dot electron spins and nuclear-spin ensembles. We consider the use of low-strain quantum dots embedded in high-cooperativity optical microcavities.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Inspired by recent developments in the control and manipulation of quantum dot nuclear spins, which allow for the transfer of an electron spin state to the surrounding nuclear-spin ensemble for storage, we propose a quantum repeater scheme that combines individual quantum dot electron spins and nuclear-spin ensembles, which serve as spin-photon interfaces and quantum memories respectively. We consider the use of low-strain quantum dots embedded in high-cooperativity optical microcavities. Quantum dot nuclear-spin ensembles allow for the long-term storage of entangled states, and heralded entanglement swapping is performed using cavity-assisted gates. We highlight the advances in quantum dot technologies required to realize our quantum repeater scheme which promises the establishment of high-fidelity entanglement over long distances with a distribution rate exceeding that of the direct transmission of photons.

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