In this paper, we propose a scheme to produce pure and macroscopical entangled coherent state. When a three-level ''V'' configuration atom interacts with a doubly reasonant cavity, under the strong classical driven condition, entangled coherent state can be generated from vacuum fields. An analytical solution for this system under the presence of cavity losses is also given.
@article{arxiv.0711.3965,
title = {Macroscopical Entangled Coherent State Generator in V configuration atom system},
author = {Ling Zhou and Han Xiong},
journal= {arXiv preprint arXiv:0711.3965},
year = {2009}
}