Entanglement witness via symmetric two-body correlations

@article{Tan2016EntanglementWV,
  title={Entanglement witness via symmetric two-body correlations},
  author={Ernest Y.-Z. Tan and D. Kaszlikowski and L. C. Kwek},
  journal={Physical Review A},
  year={2016},
  volume={93},
  pages={012341}
}
  • Ernest Y.-Z. Tan, D. Kaszlikowski, L. C. Kwek
  • Published 2016
  • Physics
  • Physical Review A
  • We construct an entanglement witness for many-qubit systems, based on symmetric two-body correlations with two measurement settings. This witness is able to detect the entanglement of some Dicke states for any number of particles, and such detection exhibits some robustness against white noise and thermal noise under the Lipkin-Meshkov-Glick Hamiltonian. In addition, it detects the entanglement of spin-squeezed states, with a detection strength that approaches the maximal value for sufficiently… CONTINUE READING
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