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Physica Scripta

Heralded entanglement concentration of nonlocal photons assisted by doublesided optical microcavities

A‐Peng Liu, Liu‐Yong Cheng, Qi Guo, Shi‐Lei Su, Hong‐Fu Wang, Shou Zhang

Published Jan 28, 2019• 8 citations
Publisher

Abstract

Abstract Assisted by a system with quantum dot (QD) embedded in doublesided microcavity, we present an entanglement concentration protocol (ECP) for two nonlocal photons with a heralded pattern, which makes this protocol intrinsically robust to the unexpected experimental detrimental effects. In addition, by using a pair of entangled QD spins, the ECP works in a parallel style but a cascade one. We assess the success probability and feasibility of this scheme and show it can be implemented with current technology.

DOI
10.1088/1402-4896/ab021f

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We propose a practical entanglement concentration protocol(ECP) for a hybrid entangled state using quantum dots and a microcavity coupled system.A hybrid less-entangled state can be concentrated to a most-entangled state with a certain probability using only one ancillary single photon.Moreover,using this protocol,we can also concentrate an arbitrary three-particle less-entangled W state using two ancillary photons and classical communication.The proposed protocols provide us with a useful method to concentrate less-entangled states,which can be implemented with current technology.
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