Abstract
The phase-space method is applied for considering continuous variable quantum teleportation. It is found that the continuous variable quantum teleportation transforms the -parametrized phase-space function of an input state into the -parametrized phase-space function, where the parameter is determined by the shared quantum entanglement. It is shown from this result that the Wigner function of the teleported state is always non-negative for and the Glauber-Sudarshan function non-negative for , where is the fidelity of the coherent-state teleportation. Furthermore the fidelity between input and output states is calculated when Gaussian states are teleported.
- Received 15 January 2004
DOI:https://doi.org/10.1103/PhysRevA.69.054304
©2004 American Physical Society