Entanglement and visibility at the output of a Mach-Zehnder interferometer

  title={Entanglement and visibility at the output of a Mach-Zehnder interferometer},
  author={Matteo G. A. Paris},
  journal={Physical Review A},
  • M. Paris
  • Published 27 November 1998
  • Physics
  • Physical Review A
We study the entanglement between the two beams exiting a Mach-Zehnder interferometer fed by a couple of squeezed-coherent states with arbitrary squeezing parameter. The quantum correlations at the output are functions of the internal phase shift of the interferometer, with the output state ranging from a totally disentangled state to a state whose degree of entanglement is an increasing function of the input squeezing parameter. A couple of squeezed vacuums at the input lead to maximum… 

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Our definition slightly differs from that of Refs. [12–14], where no normalization to a thermal state was used

  • Our definition slightly differs from that of Refs. [12–14], where no normalization to a thermal state was used

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