腔量子电动力学中的密集编码方案研究
关键词：量子密集编码；W类态；腔量子电动力学
Schemes for implementing perfect dense coding in cavity QED
Abstract: In the introduction we review the concept of cavity quantum electrodynamics (QED) and quantum dense coding. We propose an experimentally feasible scheme of preparing W-class entangled state, distinguishing four mutually orthogonal W-class entangled state and then implementing perfect quantum dense coding with three-atom W-class entangled state, which was proposed by Agrawal et al (Phys. Rev. A. 74 (200
6) 0623
20), in cavity QED. In the scheme the atoms interact simultaneously with a highly detuned cavity field and the cavity is only virtually excited, thus the scheme is insensitive to the cavity decay，and it can be carried out in the experiment.
Keywords: Dense coding； W-class state； cavity QED
