|
Abstract |
We revisit continuous variable quantum teleportation to establish the link with Einstein-Podolsky-Rosen paradox ("steering") correlations. We generalize traditional protocols by allowing non-unity classical gains, thus considering quantum tele-amplification of a coherent state. By matching the choice of classical gain to the asymmetry in the entanglement of the resource, and employing a local pre-amplification or attenuation, we find that one can enhance the fidelity of teleportation and greatly broaden the class of entangled Gaussian states that are useful for CV quantum teleportation. High fidelity (no-cloning) teleportation is possible using a large subset of Gaussian two-way steerable states. Surprisingly, we find that fidelity can be optimized without maximal entanglement.
References:
- Q. Y. He, Q. H. Gong, and M. D. Reid, arXiv:1406.6708 (2014).
- M. D. Reid, Q. Y. He, arXiv:1410.1041 (2014). |
