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Title: Multipartite polariton entanglement in semiconductor microcavities

We study the entanglement of multiple polariton modes, which results in continuous variable cluster states suitable for quantum computation. Schemes are based on parametric scattering between spin-polarized lower and upper polariton branches in planar microcavities or spin-polarized orbital angular momentum states in mesa structures. Such systems are modeled by numerical solution of truncated density matrices and compared to the solution of the Heisenberg equations for the set of field correlators up to third order. Four-body entanglement is evidenced by violation of the van Loock-Furusawa quadripartite inequalities. We show that the entanglement is able to withstand a realistic strength of pure dephasing present in typical systems.
Authors:
;  [1]
  1. Institute of Theoretical Physics, Ecole Polytechnique Federale de Lausanne EPFL, CH-1015 Lausanne (Switzerland)
Publication Date:
OSTI Identifier:
22068646
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; DENSITY MATRIX; FOUR-BODY PROBLEM; NUMERICAL SOLUTION; ORBITAL ANGULAR MOMENTUM; QUANTUM COMPUTERS; QUANTUM ENTANGLEMENT; SCATTERING; SEMICONDUCTOR MATERIALS; SPIN ORIENTATION