Open AccessConcentration of entangled nitrogen-vacancy centers in decoherence free subspace
Author(s) -
Chuan Wang,
Zhihui Wang,
Yong Zhang,
Rongzhen Jiao,
Guodong Jin
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.001551
Subject(s) - quantum decoherence , quantum entanglement , dephasing , physics , w state , quantum mechanics , subspace topology , quantum computer , robustness (evolution) , photon , photon entanglement , cluster state , quantum sensor , coherence (philosophical gambling strategy) , quantum technology , quantum , quantum network , computer science , open quantum system , chemistry , biochemistry , artificial intelligence , gene
Exploiting the input-output process of low-Q cavities confining nitrogen-vacancy centers, we present an efficient entanglement concentration protocol on electron spin state in decoherence free subspace. Less entangled state can be concentrated to maximally entangled state with the assistance of single photon detection. With its robustness and scalability, the present protocol is immune to dephasing and can be further applied to quantum repeaters and distributed quantum computation.