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腔量子電動(dòng)力學(xué)中的密集編碼方案研究
腔量子電動(dòng)力學(xué)中的密集編碼方案研究
摘要 在論文的前言中我們簡(jiǎn)單介紹了腔量子電動(dòng)力學(xué)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(dòng)力學(xué)制備W類(lèi)糾纏態(tài)的方案,并且識別出4個(gè)互相正交的3原子W類(lèi)糾纏態(tài),從而實(shí)現了1個(gè)基于腔量子電動(dòng)力學(xué)的密集編碼實(shí)驗方案(理論方案是由Agrawal等人在Phys. Rev. A. 74 (2006) 062320中提出來(lái)的)。在這個(gè)方案中所有原子同時(shí)和大失諧腔場(chǎng)作用,腔場(chǎng)只是被虛激發(fā),因此該方案對腔場(chǎng)的消相干不敏感,而且具備實(shí)驗可行性。
關(guān)鍵詞:量子密集編碼;W類(lèi)態(tài);腔量子電動(dòng)力學(xué)
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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