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Communications in Theoretical Physics

Error-rejecting entanglement concentration for electron spins in quantum dots assisted by optical cavity

Xin Wang, Chunyan Li, Bao‐Cang Ren

Published May 21, 2025• 0 citations
Publisher

Abstract

Abstract We present error-rejecting entanglement concentration protocols (ECPs) for partially entangled electron spins in quantum dots (QDs) with unknown and known parameters using quantum electrodynamics of QDs coupled with optical cavities, which can recover the partially entangled state to the maximally entangled state with unit fidelity even in the non-ideal experimental condition. The error-rejecting ECP for a partially entangled state utilizes parity check operations on electron spins within QDs. Furthermore, for a partially entangled state with known parameters, the ECP is devised through a parameter-splitting approach. The success probabilities of these two error-rejecting ECPs can be further improved by using the resource recycling method and iteration method. On account of their unit fidelity and considerable success probability, the error-rejecting ECPs have promising application value in improving the fidelity of quantum communication.

DOI
10.1088/1572-9494/addb29

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