Open AccessLarge-scale continuous-variable dual-rail cluster entangled state based on spatial mode comb
Author(s) -
J Zhang,
J J Wang,
Rongguo Yang,
Kui Liu,
Jiangrui Gao
Publication year - 2017
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.25.027172
Subject(s) - quantum entanglement , spontaneous parametric down conversion , physics , optics , multipartite entanglement , cluster state , w state , quantum optics , quantum teleportation , parametric statistics , topology (electrical circuits) , quantum channel , quantum mechanics , quantum , squashed entanglement , mathematics , statistics , combinatorics
In recent continuous-variable (CV) multipartite entanglement researches, the number of fully inseparable light modes has been increased dramatically by the introduction of a multiplexing scheme in either the time domain or the frequency domain. In this paper, we propose a scheme that a large-scale (≥ 20) CV dual-rail cluster entangled state is established based on a spatial mode comb in a self-imaging optical parametric oscillator, which is pumped by two spatial Laguerre-Gaussian modes with different polarization and identical frequency. A sufficient condition of full inseparability for a CV dual-rail cluster entangled state is used to evaluate the degree of quantum entanglement. It is shown that entanglement exists over a wide range of analyzing frequency and pump parameter. We have found a new scheme that uses the optical parametric cavity to generate a large-scale entanglement based on optical spatial mode comb. The presented system will be hopefully as a practical entangled source for quantum information.