Non-Gaussian entangled states and quantum teleportation of Schrödinger-cat statesA review in honor of V Manko and M Manko. Academic Article uri icon

abstract

  • © 2015 The Royal Swedish Academy of Sciences. In continuous-variable quantum information, non-Gaussian entangled states that are obtained from Gaussian entangled states via photon subtraction are known to contain more entanglement. This makes them better resources for quantum information processing protocols, such as, quantum teleportation. We discuss the teleportation of non-Gaussian, non-classical Schrödinger-cat states of light using two-mode squeezed vacuum light that is made non-Gaussian via subtraction of a photon from each of the two modes. We consider the experimentally realizable cat states produced by subtracting a photon from the single-mode squeezed vacuum state. We discuss two figures of merit for the teleportation process, (a) the fidelity, and (b) the maximum negativity of the Wigner function at the output. We elucidate how the non-Gaussian entangled resource lowers the requirements on the amount of squeezing necessary to achieve any given fidelity of teleportation, or to achieve negative values of the Wigner function at the output.

altmetric score

  • 1

author list (cited authors)

  • Seshadreesan, K. P., Dowling, J. P., & Agarwal, G. S.

citation count

  • 24

publication date

  • June 2015