Teleportation of an Arbitrary Two-Particle State by Two Partial Entangled Three-Particle GHZ States

We present a scheme for teleporting an unknown arbitrary two-particle state from a sender to either one of two receivers. The quantum channel is composed of two partial entangled three-particle GHZ states. An unknown arbitrary two-particle state can be perfectly teleported probabilistically if the sender performs two generalized Bell-state measurements and each receiver introduces an appropriate unitary transformation with the help of the other receiver's Hadamard operations and simple measurements.

Quantum Information Splitting of an Arbitrary Three-Qubit State by Using Cluster States and Bell States

簇状态的新应用为一个任意的 three-qubit 状态的切开的量信息(QIS ) 被调查。在我们的计划，一个 four-qubit 簇状态和一个贝尔状态被一个发送者(艾莉斯) 分享，一个控制器(查理) ，和接收装置(鲍勃) 。发送者和控制器仅仅需要执行钟状态大小(BSM ) ，接收装置能重建由在他知道发送者和控制器的测量结果以后，在他的 qubits 上执行一些适当地单一的转变州的任意的 three-qubit。这个 QIS 计划是确定的。

Tripartite Splitting Arbitrary 2-Qubit Quantum Information by Using Two Asymmetric W States

在这篇论文，我们为由把二个不对称的 W 状态用作量隧道切开一个任意的 2-qubit 量信息建议一个分成三部分的计划。如果二个接受者一起协作，在 schemem，他们装确定的联盟者由执行第一一 4-qubit 恢复量信息集体单一的操作然后二 single-qubit 单一的操作。另外，自从不对称的 W 状态作为量隧道被采用，计划对 decoherence 是柔韧的。

Methods for Derivation of Density Matrix of Arbitrary Multi-Mode Gaussian States from Its Phase Space Representation

We present a method for derivation of the density matrix of an arbitrary multi-mode continuous variable Gaussian entangled state from its phase space representation.An explicit computer algorithm is given to reconstruct the density matrix from Gaussian covariance matrix and quadrature average values.As an example,we apply our method to the derivation of three-mode symmetric continuous variable entangled state.Our method can be used to analyze the entanglement and correlation in continuous variable quantum network with multi-mode quantum entanglement states.

Quantum private comparison of arbitrary single qubit states based on swap test

By using swap test,a quantum private comparison(QPC) protocol of arbitrary single qubit states with a semi-honest third party is proposed.The semi-honest third party(TP) is required to help two participants perform the comparison.She can record intermediate results and do some calculations in the whole process of the protocol execution,but she cannot conspire with any of participants.In the process of comparison,the TP cannot get two participants’ private information except the comparison results.According to the security analysis,the proposed protocol can resist both outsider attacks and participants’ attacks.Compared with the existing QPC protocols,the proposed one does not require any entanglement swapping technology,but it can compare two participants’ qubits by performing swap test,which is easier to implement with current technology.Meanwhile,the proposed protocol can compare secret integers.It encodes secret integers into the amplitude of quantum state rather than transfer them as binary representations,and the encoded quantum state is compared by performing the swap test.Additionally,the proposed QPC protocol is extended to the QPC of arbitrary single qubit states by using multi-qubit swap test.

Probabilistic teleportation of an arbitrary three-particle state

A scheme for teleporting an arbitrary and unknown three-particle state from a sender to either one of two receivers is proposed. The quantum channel is composed of a two-particle non-maximally entangled state and two three-particle non-maximally entangled W states. An arbitrary three-particle state can be perfectly teleported probabilistically if the sender performs three generalized Bell-state measurements and sends to the two receivers the classical result of these measurements, and either one of the two receivers adopts an appropriate unitary transformation conditioned on the suitable measurement outcomes of the other receiver. All kinds of unitary transformations are given in detail.

A new representation and probabilistic teleportation of an arbitrary and unknown N-particle state

A new representation of an arbitrary and unknown N-particle state is presented at first. As an application, a scheme for teleporting an arbitrary and unknown N-particle state is proposed when N pairs of two-particle non- maximally entangled states are utilized as quantum channels. After Alice （sender） makes Bell-state measurement on her particles, Bob （recipient） introduces an auxiliary particle and carries out appropriate unitary transformation on his particle and the auxiliary particle depending on classical information from Alice. Then, von Neumann measurement that confirms whether the teleportation succeeds or not is performed by Bob on the auxiliary particle. In order to complete the teleportation, another N-1 times operations need to be performed which are similar to the above ones. It can be successfully realized with a certain probability which is determined by the product of the smaller coefficients of non-maximally entangled pairs. All possible unitary transformations are given in detail.

Probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel and its application in quantum state sharing

This paper presents a scheme for probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel. The sender Alice first teleports the coefficients of the unknown state to the receiver Bob, and then Bob reconstructs the state with an auxiliary particle and some unitary operations if the teleportation succeeds. This scheme has the advantage of transmitting much less particles for teleporting an arbitrary GHZ-class state than others. Moreover, it discusses the application of this scheme in quantum state sharing.

Controlled Teleportation of an Arbitrary Two-Particle State by One EPR Pair and Cluster State

A scheme for controlled teleportation of an arbitrary two-particle state using a maximally entangled EPRpair and a cluster state as the quantum channel is proposed.After receiving Alice’s Bell state measurement results,the controller performs a joint measurement on his particles under a non-maximally entangled Bell-basis.The receiverneeds to introduce an auxiliary qubit,and performs a series of appropriate unitary transformations on his particles.Theoriginal state can be teleported successfully with the probability 2 cos2 9.

Teleportation of an Arbitrary Three-Particle State via Three EPR Pairs

A scheme of teleportation of an arbitrary three-particle state is presented when three pairs of entangled particles are used as quantum channels. After the Bell state measurements are operated by the sender, the original state with deterministic probability can be reconstructed by the receiver when a corresponding unitary transformation is followed.

Tripartite Arbitrary Two-Qutrit Quantum State Sharing

为安全地分享一个任意的未知 two-qutrit 状态的一个分成三部分的计划被建议，在二个概括 Greenberger Horne Zeilinger (GHZ ) 状态用作连接三个合法聚会的量隧道的地方。量信息(即，任意的未知 two-qutrit 状态) 从发送者，罐头以如此的一个方法被切开，它能被重建由经由合适的单一的操作的任何代理人的确定的联盟者如果两个代理人一起协作。而且，到更多聚会大小写的分成三部分的计划的归纳也被构画出。

Probabilistic Teleportation of an Arbitrary Two-Particle State and Its Quantum Circuits

为用 non-maximally 纠缠的 EPR 对和 non-maximally 纠缠的 GHZ 的一个任意的 unknowntwo 粒子状态的概率的远距传物的二个简单计划作为量声明隧道被建议。在收到艾莉斯的贝尔状态测量结果以后， Bobperforms 他没有介绍辅助 qubit 的固有的粒子上的集体单一的转变。原来的状态能是移植的概率的联盟者电视。同时，为成功的远距传物的实现的量电路也被介绍。

Probabilistic Teleportation of an Arbitrary Two-Atom State in Cavity QED

我们由在洞证完把二个二原子的 Ronmaximally 纠缠的状态用作量隧道为一个任意的二原子的状态的远距传物建议一个计划。显示出的 Itis 不管是移植的电视的任意的二原子的纯状态是否被纠缠，我们的远距传物计划能总是是概率的认识到的联盟者。远距传物的成功概率被二开始纠缠的原子对的更小的系数决定。

Quantum Logic Networks for Probabilistic Teleportation of an Arbitrary Three-Particle State

The scheme for probabilistic teleportation of an arbitrary three-particle state is proposed. By using single qubit gate and three two-qubit gates, efficient quantum logic networks for probabilistic teleportation of an arbitrary three-particle state are constructed.

Probabilistic teleportation of an arbitrary pure state of two atoms

In the context of microwave cavity QED, this paper proposes a new scheme for teleportation of an arbitrary pure state of two atoms. The scheme is very different from the previous ones which achieve the integrated state measurement, it deals in a probabilistic but simplified way. In the scheme, no additional atoms are involved and thus only two atoms are required to be detected. The scheme can also be used for the teleportation of arbitrary pure states of many atoms or two-mode cavities.

Deterministic remote state preparation of arbitrary three-qubit state through noisy cluster-GHZ channel

We propose a novel scheme for remote state preparation of an arbitrary three-qubit state with unit success probability,utilizing a nine-qubit cluster-GHZ state without introducing auxiliary qubits.Furthermore,we proceed to investigate the effects of different quantum noises(e.g.,amplitude-damping,phase-damping,bit-flip and phase-flip noises)on the systems.The fidelity results of three-qubit target state are presented,which are usually used to illustrate how close the output state is to the target state.To compare the different effects between the four common types of quantum noises,the fidelities under one specific identical target state are also calculated and discussed.It is found that the fidelity of the phase-flip noisy channel drops the fastest through the four types of noisy channels,while the fidelity is found to always maintain at 1 in bit-flip noisy channel.

Preparation of GHZ States via Grover's Quantum Searching Algorithm

We propose an approach to prepare GHZ(Greenberger,Horne,Zeilinger)states of an arbitrary multi-particle system in terms of Grover's fast quantum searching algorithm.The approach can be used to produce other entangled states with variou degrees of entanglement.

A Scheme for Preparing Schrödinger Cat States with Controllable Manners

A scheme to generate superpositions of coherent states with variable amplitudes,phases and weighting factors is proposed.It provides experimental possibility for preparing an arbitrary Schrödinger cat state.

Teleporation of an Arbitrary Two-Particle State Without Bell-State Measurement in Cavity QED

为没有在洞证完的钟状态测量的一个任意的二粒子的状态的近似有条件的远距传物的一个计划被介绍。计划包含四个二水平的原子和二个单个模式的洞。3 和 4 折叠的原子的察觉原子 1 和 2 到原子的起始的状态 3 和 4，当洞地处于真空状态离开了时。成功的概率和我们的计划的忠实分别地是 0.125 和 0.98。