一个特殊五粒子纠缠态的制备方案

J4 ›› 2017, Vol. 34 ›› Issue (4): 462-466.

一个特殊五粒子纠缠态的制备方案

张瑾,严飞

安徽建筑大学数理学院，安徽合肥 230022

收稿日期:2016-02-03 修回日期:2016-06-30 出版日期:2017-07-28 发布日期:2017-08-29

A scheme for preparing a genuinely entangled five-qubit state

Received:2016-02-03 Revised:2016-06-30 Published:2017-07-28 Online:2017-08-29

摘要/Abstract

摘要： 实现不同的量子信息过程往往需要不同的纠缠态，但一个特殊的五粒子纠缠态已被证明可用于量子隐形传态、量子态共享以及量子密集编码等多个量子信息过程。基于腔量子电动力学，提出了制备这个特殊五粒子纠缠态的方案。制备过程如下：首先选择原子和腔场处于一定的初始态，然后让多个原子在腔场中发生相互作用，并选择相互作用时间，再通过经典的幺正变换，最终实现将五个原子制备于特殊的纠缠态。在整个制备过程中，原子和腔场之间没有能量的交换，而且无需进行任何量子测量，这使得该方案在实验上更易实现。

关键词: 量子光学，纠缠态制备，腔量子电动力学，原子和腔场相互作用

Abstract: For different purposes different entangled states are usually needed, but a special entangled five-qubit state has been shown to be used for perfect quantum teleportation, quantum state sharing, and quantum dense coding. Based on cavity quantum electrodynamics the new efficient scheme for generating this state is proposed. The procedure can be operated as follows. First choose the initial state of atoms and the cavity field, then let a number of atoms in cavity field interact and make choice of their interaction time. Through the classical unitary transformations the five atoms are entangled in the special state. In the whole procedure there is no energy exchange between the atoms and the cavity field, and moreover, no quantum measurement is needed, so the scheme is more feasible under the current experimental technology.

Key words: quantum optics, preparation of entangled states, cavity quantum electrodynamics, atom-cavity interaction

张瑾严飞. 一个特殊五粒子纠缠态的制备方案[J]. J4, 2017, 34(4): 462-466.

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