Witnessing Entanglement with Second-Order Interference and Stokes Parameters
arXiv:quant-ph/0608006 · doi:10.1556/APH.26.2006.3-4.10
Abstract
We propose to use Stokes parameter as an entanglement witness for correlated EPR mixed states of light. Such states can be generated with a beam splitter acting on two mixed squeezed states of light. Stokes witness operators are closely related to the Hanbury-Brown and Twiss interference and can be used to test entanglement in balanced homodyne experiments involving fluctuations of quantum quadratures of the electric field.
10 pages, 2 figure