Improvement on teleportation of continuous variables by photon subtraction via conditional measurement
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- 9 February 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 61 (3) , 032302
- https://doi.org/10.1103/physreva.61.032302
Abstract
We show that the recently proposed scheme of teleportation of continuous variables [S.L. Braunstein and H.J. Kimble, Phys. Rev. Lett. 80, 869 (1998)] can be improved by a conditional measurement of the entangled state shared by the sender and the recipient. The conditional measurement subtracts photons from the original entangled two-mode squeezed vacuum, by transmitting each mode through a low-reflectivity beam splitter and performing a joint photon-number measurement on the reflected beams. In this way the degree of entanglement of the shared state is increased and so is the fidelity of the teleported state.Keywords
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