Open AccessFeasible measurement-based entanglement purification in linear optics
Author(s) -
Peishun Yan,
Lan Zhou,
Wei Zhong,
YuBo Sheng
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.420348
Subject(s) - quantum entanglement , repeater (horology) , physics , quantum optics , realization (probability) , quantum metrology , quantum teleportation , quantum key distribution , spontaneous parametric down conversion , computer science , noise (video) , qubit , quantum information , quantum network , quantum , optics , quantum mechanics , mathematics , encoding (memory) , statistics , image (mathematics) , artificial intelligence
Entanglement purification is used to distill high quality entangled states from several noisy low quality entangled states, and it plays a key role in quantum repeater. The measurement-based entanglement purification protocol (MB-EPP) does not require local two-qubit gates or single-particle measurements on the noisy pairs and may offer significant advantages compared with the gate-based EPPs. We present an alternative MB-EPP in linear optics. Subsequently, we provide a detailed analysis on the realization of this MB-EPP using spontaneous parametric down conversion (SPDC) sources. By delicately designing the optical circuits, the double-pair emission noise caused by SPDC sources can be eliminated automatically. Combined with suitable quantum memory and entanglement swapping, this MB-EPP may have application potential in the implementation of a practical measurement-based quantum repeater.