腔量子電動力學中的密集編碼方案研究
摘要 在論文的`前言中我們簡單介紹了腔量子電動力學和量子密集編碼的基本原理，在正文中我們首先提出1種基於腔量子電動力學制備W類糾纏態的方案，並且識別出4個互相正交的3原子W類糾纏態，從而實現了1個基於腔量子電動力學的密集編碼實驗方案（理論方案是由Agrawal等人在Phys. Rev. A. 74 (2006) 062320中提出來的）。在這個方案中所有原子同時和大失諧腔場作用，腔場只是被虛激發，因此該方案對腔場的消相干不敏感，而且具備實驗可行性。
關鍵詞：量子密集編碼；W類態；腔量子電動力學
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 (2006) 062320), 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
