Classical phase-space descriptions of continuous-variable teleportation.
The non-negative Wigner function of all quantum states involved in teleportation of Gaussian states using the standard continuous-variable teleportation protocol means that there is a local realistic phase-space description of the process. This includes the coherent states teleported up to now in experiments. We extend the phase-space description to teleportation of non-Gaussian states using the standard protocol and conclude that teleportation of non-Gaussian pure states with a fidelity of 2/3 is a "gold standard" for this kind of teleportation.
Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131-1156, USA. caves@info.phys.unmedu
Carlton M
CM
Caves
Krzysztof
K
Wódkiewicz