Engineering non-Gaussian entangled states with vortices by photon subtraction Academic Article uri icon


  • We show how a quantum mechanical vortex state of a two-mode system can be generated from a squeezed vacuum by subtracting a photon. The vortex state has nonclassical properties; for example, its Wigner function can be negative, in contrast to the Wigner function of the two-mode squeezed vacuum. We show, by calculating the logarithmic negativity parameter, that the vortex state has stronger entanglement than the two-mode squeezed vacuum. IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

published proceedings

  • New Journal of Physics

author list (cited authors)

  • Agarwal, G. S.

citation count

  • 28

complete list of authors

  • Agarwal, GS

publication date

  • July 2011