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腔量子電動力學中的密集編碼方案研究
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種基于腔量子電動力學制備W類糾纏態的方案,并且識別出4個互相正交的3原子W類糾纏態,從而實現了1個基于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
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