Bell States

In the first case , we consider quantum channels are a mixture of Bell states .

在第一种情况下，考虑用两Bell态的混合态作为量子信道，研究发现远程态制备的迹距依赖于Bell态的混合比和待传送态的初始特征。

Investigation shows that the protocol is secure and two Bell states can be used to share two bits message .

分析表明该协议是安全的，效率可以达到2个Bell态共享2bit经典消息。

It is necessary to study the emission spectrum from cavity-bound atoms in Bell states .

在量子信息的处理和传输，两粒子Bell态在量子通信和量子计算中占有极其重要的地位，因而我们有必要对腔束缚纠缠态原子的辐射谱特性的进行研究。

Emission Spectrum from a Two-Atom System in Bell States Interacting with a Large-Detuned Cavity Field

Bell态原子与大失谐腔相互作用的辐射谱

To simplify the implementation of quantum secret sharing , a protocol based on Bell states entanglement swapping was proposed .

为使量子秘密共享易于实现，提出了一种基于Bell态纠缠交换的协议。

In this paper we will show nine tripartite QOS schemes we proposed by using W states and Bell states as quantum channels .

本文介绍了我们用Bell态和W态作为量子通道提出的九个量子操作分享方案。

The analysis results show that all Bell states are maximally entangled states , but they are two different local SU_2 transformation invariant .

结果表明，虽然Bell基都是纠缠度最大的纠缠态，但从局域SU2变换不变量看其仍是两种形式。

Time-evolution of the atom 's occupancy of two-mode field interacting with two atoms in Bell states via multiphoton process

双模相干场与Bell态原子多光子作用的原子布居数演化

In our model , any two communication sites can construct an entanglement channel of Bell states with the assistance of the intermediate sites on their quantum chain .

在该网络模型中，任意两个站点都可以在其量子链路的中间节点的帮助下，构建起一个Bell态信道。

Drawing idea from the quantum secure direct communication ( QSDC ), a novel quantum secret sharing ( QSS ) scheme with high efficiency based on Bell states was proposed .

利用量子安全直接通信（QSDC）的思想，提出1个新的基于Bell态的高效量子秘密共享（QSS）方案。

We study how to teleport the quantum state of a photon using two particle EPR Bell states , and present experimental ideas of dense coding based on two photon entanglement .

研究如何利用两粒子形成的EPR－Bel态传输光子的量子态，并提出依赖于两光子缠绕的密集编码实验设想。

Then , by replacing the maximally entangled Bell states with non-maximally entangled states , the forward scheme has been improved to a new QSS-SDC scheme .

然后，用非最大化纠缠态代替最大化纠缠的量子Bell态，对前述方案进行了改进，设计了一个新的量子秘密共享方案。

By means of time-evolution operator , it was studied that of the emission spectrum from two two-level entangled atoms in Bell states interacting with a large-detuned single-mode cavity field .

用时间演化算符的方法，研究了两个全同的二能级Bell态原子与腔场大失谐作用时的辐射谱。

The scheme reveals some particular properties of the related four-partite entangled state , and indicates that in some sense the amount of entanglement of two Bell states can be abstracted from any one of the four-partite states .

该方案揭示了一种四体纠缠态的某种特殊纠缠属性，并表明从某种意义上来讲，还可以从这样的一个四体纠缠态中提取出2个Bell态的纠缠。

We construct orthogonal Bell states with entangled squeezed vacuum states and show that if the perfect photon counters are feasible , these Bell states can be discriminated with arbitrary precision when the amplitude of the squeezed states becomes sufficiently large .

我们用纠缠的压缩态构造贝尔基，并证明当压缩态的振幅充分大的时候，我们能以任意高的精确度识别这样的贝尔基，前提是要有理想的光子计数器。

In the process , the sender Alice makes the Bell states measurement twice , and then sends the outcome to Bob by classical channel , so Bob can reconstruct the quantum state which Alice wants to send by using the corresponding unitary transformation .

在此方案中发送者Alice只要进行两次Bell态测量，并将测量结果通过经典信道告诉Bob，Bob根据接收到的信息即可通过相应的幺正变换来重建Alice要传输的量子态。

The results show that the influence of the cavity decay constant on different kinds of Bell states is completely different , and the state Ψ〉 - 12 is a robust entangled state against the decoherence while the state Φ〉 - 12 is a fragile entangled state .

研究结果表明：腔场的衰变常数对不同类型的Bell纠缠态的影响完全不同，其中Ψ〉12态具有强烈的抗消纠缠的能力，而Φ〉12态是一个脆弱的纠缠态。

We may make three-particle entanglement using the source of three-particle W states . Put this particle entanglement down as quantum channel , and transfer information of Bell states measurement and von Neumann measurement using classical channel , the quantum teleportation net may then be realized .

利用W态纠缠源可以产生三纠缠粒子，用这些相互纠缠的粒子作为量子信道，再辅以经典信道传送Bell基联合测量信息和vonNeumann测量信息，便可实现量子隐形传态网络。

By means of time-evolution operator , we have studied the emission spectrum from two-atom in Bell basis states through the Raman interaction with a cavity-field in the Fock state in the paper . The physical spectrum expression of radiation emitted by the atom is given out .

采用时间演化算符方法，研究了Fock态腔场内通过拉曼相互作用的Bell态下两原子的辐射谱，给出了原子辐射谱的物理表达式。