Chinese Optics Letters, 2003, 1 (2): 02114, Published Online: Jun. 6, 2006   

Improving the fidelity of continuous-variable quantum teleportation by tuning displacement gain

Author Affiliations
1 Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026
2 Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Abstract
The fidelity of teleportation of continuous quantum variables can be improved by tuning the local displacement gain. We investigate the optimization of the fidelity for the teleportation of Schrodinger cat states, and of coherent states. It is found that the gain corresponding to the maximum fidelity is not equal to one for the two input states in the case of the small squeezing degree of the entanglement resource, while unity displacement gain is the best choice for teleporting arbitrary quantum states in the case of large squeezing.

Jinming Liu, Jian Li, Guangcan Guo. Improving the fidelity of continuous-variable quantum teleportation by tuning displacement gain[J]. Chinese Optics Letters, 2003, 1(2): 02114.

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