Efficient scheme for realizing quantum dense coding with GHZ state in separated low-Q cavities
Qian Sun, Juan He, Liu Ye · Chinese Physics B · 2014
We propose an efficient scheme for realizing quantum dense coding with three-particle GHZ state in separated low-Q cavities. In this paper, the GHZ state is first prepared with three atoms trapped, respectively, in three spatial separated cavities. Meanwhile, with the assistance of a coherent optical pulse and X-quadrature homodyne measurement, we can implement quantum dense coding with three-particle GHZ state with a higher probability. Our scheme can also be generalized to realize N -particle quantum dense coding.