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1.
Using partial entangled states as the quantum channel, two schemes for probabilistic remote preparation of the four-particle cluster-type state with real and complex coefficients are presented. In the first scheme, the sender and the receiver share two partial Bell states and one partial three-qubit GHZ stats as the quantum channel, and the sender can help a remote receiver to prepare a four-particle entangled cluster-type state by using three-qubit projective measurements with certain probability. In the second scheme, the quantum channel is composed of two partial three-qubit GHZ states, the remote state preparation (RSP) can be successfully realized via the positive operator valued measure (POVM), and the two-particle projective measurements are also needed in this process. The total success probability and classical communication cost are calculated. 相似文献
2.
设计了一组新的量子远程态制备步骤,在发送方对手中的粒子完成测量后,接收方采用该步骤可以有效降低远程态制备的经典通信消耗-给出一种利用部分纠缠的三粒子Greenberger-Horne-Zeilinger(GHZ)态和部分纠缠的二粒子态作信道,远程制备一个三粒子GHZ态的方案,以此方案为例具体说明上述方法的运用步骤并给出了该方法的适用范围-结果表明,运用该方法后只需消耗1bit经典信息即可远程制备一个三粒子GHZ态-
关键词:
远程态制备
经典通信消耗
三粒子Greenberger-Horne-Zeilinger态
量子信道 相似文献
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4.
This paper proposes a scheme for teleporting a kind of essential three-particle
non-symmetric entangled state, which is much more valuable than a GHZ and W state
for some applications in quantum information processing. In comparison with previous
proposal of teleportation, the resources of entangled states as quantum channel and
the number of classical messages required by our scheme can be cut down. Moreover,
it is shown that there exists a class of transformations which ensure the success of
this scheme, because the two-particle transformation performed by the receiver in
the course of teleportation may be a generic two-particle operation instead of a
control-NOT (CNOT) operation. In addition, all kinds of transformations performed by
sender and receiver are given in detail. 相似文献
5.
提出用三粒子纠缠态作量子信道远程操纵单比特旋转的理论方案。首先,我们利用最大纠缠的GHZ态的性质远程操纵单比特旋转,其保真度和成功几率均为1。 我们还提出了两个用部分纠缠的GHZ态作量子信道实现保真度为1的远程操纵单比特旋转的方案。这些方案的特点是,两地之间还存在一第三者,他作为监控方参与量子远程操纵过程,特别地,当量子信道为部分纠缠态时,他能矫正被非理想量子信道致畸的量子态。除了GHZ型态外,我们还证明了W型态亦可用作量子信道远程操纵单比特旋转,但后者的成功几率总是小于前者。 相似文献
6.
We propose a scheme to remotely prepare a general two-particle entangled state by using a bipartite entangled state and a tripartite entangled W state as the quantum channel.Our scheme consists of one sender and two remote receivers.The sender can help either one of the receivers to remotely reconstruct the original state with the assistance of the other receiver's single-particle orthogonal measurement.We obtain the total success probability and discuss the classical communication cost in our remote state preparation scheme. 相似文献
7.
We propose two schemes for teleporting an arbitrary three-particle state.In the first scheme,a two-particle state and a three-particle entangled state (both non-maximally entangled states)are used as quantum channels,while in the second scheme,three non-mnaximally entangled particle pairs are employed as quantum channels.We show that teleportation can be successfully realized with certain probability if a receiver adopts some appropriate unitary transformations.Their success probabilities and the classical communication costs are different. 相似文献
8.
Hong-Hui Liu Liu-Yong Cheng Xiao-Qiang Shao Li-Li Sun Shou Zhang Kyu-Hwang Yeon 《International Journal of Theoretical Physics》2011,50(10):3023-3032
We propose a scheme to joint remotely prepare arbitrary two- and three-particle entangled states by using non-maximally three-particle
GHZ state as the quantum channel. Our scheme consists of two senders and one receiver. It will be shown that two senders can
help the receiver to remotely prepare the original state with certain probability. The projective measurement and corresponding
unitary operation are needed in this article. 相似文献
9.
提出一种任意两粒子纠缠态1→2普适远程克隆方案. 此方案仅需一个特殊的四粒子纠缠态作为量子信道, 就可使处于空间不同位置的两个接收者分别以5/6的保真度得到任意输入态的近似拷贝, 该保真度远高于已有方案中的保真度. 将方案推广到任意两粒子纠缠态1→N(N>2)普适远程克隆的情况, 可使处于不同地点的N个接收者分别以(2N+1)/(3N)的保真度得到输入态的近似拷贝. 另外, 提出一种以上述单个特殊四粒子纠缠态作为量子信道, 在多目标量子比特受控非门和
关键词:
量子纠缠态
普适远程克隆
保真度 相似文献
10.
We present two schemes for preparing remotely a three-particle entangled state by two different quantum channels. In the first scheme, two partial three-particle entangled states are used as the quantum channels, while in the second scheme, three two-particle non-maximally entangled states are employed as the quantum channels. It is shown that the remote state preparation can be successfully realized with certain probability, for both two schemes, if a sender performs some projective measurements and a receiver adopts some appropriate unitary transformations. It is shown also that the successful probabilities of these two schemes are different. 相似文献
11.
ZHAN You-Bang WANG Yu-Wu 《理论物理通讯》2007,48(3):449-452
We present two schemes for preparing remotely a three-particle entangled state by two different quantum channels. In the first scheme, two partial three-particle entangled states are used as the quantum channels, while in the second scheme, three two-particle non-maximally entangled states are employed as the quantum channels. It is shown that the remote state preparation can be successfully realized with certain probability, for both two schemes, if a sender performs some projective measurements and a receiver adopts some appropriate unitary transformations. It is shown also that the successful probabilities of these two schemes are different. 相似文献
12.
13.
Teleportation of an Arbitrary Two-Particle State by Two Partial Entangled Three-Particle GHZ States 总被引:2,自引:0,他引:2
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. 相似文献
14.
Kui Hou Jing Wang Yi-Lin Lu Shou-Hua Shi 《International Journal of Theoretical Physics》2009,48(7):2005-2015
For two parties sharing the original state, a scheme for remote preparation of the two-particle entangled state by three partial
two-particle entangled states as the quantum channel is presented, and then directly generalize the scheme for remotely preparing
a multipartite GHZ-class state for M senders. It is shown that the receiver can obtain the unknown state with certain probability under the condition that only
and only if all the senders collaborate with each other. The N-particle projective measurement and the von Neumann measurement are needed in our scheme. The probability of the successful
remote state preparation and classical communication cost are calculated. 相似文献
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Probabilistic teleportation of an arbitrary three-particle state via a partial entangled four-particle state and a partial entangled pair 总被引:5,自引:0,他引:5 下载免费PDF全文
We present a scheme to probabilistically teleport an arbitrary and unknown three-particle state via a two-particle non-maximally entangled state and a four-particle non-maximally entangled state as the quantum channel. With the help of Bell-state measurements, an arbitrary three-particle state can be perfectly teleported if a receiver introduces a collective unitary transformation. All kinds of unitary transformations are given in greater detail. This scheme can be generalized to the teleportation of an arbitrary and unknown multiparticle state. 相似文献
17.
Quantum teleportation is of significant meaning in quantum information. In this paper, we study the probabilistic teleportation of a two-qubit entangled state via a partially entangled Greenberger- Horne-Zeilinger (GHZ) state when the quantum channel information is only available to the sender. We formulate it as an unambiguous state discrimination problem and derive exact optimal positive-operator valued measure (POVM) operators for maximizing the probability of unambiguous discrimination. Only one three-qubit POVM for the sender, one two-qubit unitary operation for the receiver, and two cbits for outcome notification are required in this scheme. The unitary operation is given in the form of a concise formula, and the fidelity is calculated. The scheme is further extended to more general case for transmitting a two-qubit entangled state prepared in arbitrary form. We show this scheme is flexible and applicable in the hop-by-hop teleportation situation. 相似文献
18.
提出了利用纠缠交换技术实现一个纠缠态的远程制备.考虑在量子信道没有遭受噪声影响的条件下,利用一对两粒子纠缠态作为量子信道去实现远程态制备.此外我们考察了噪声存在时的远程态的制备,研究显示不同类型的量子噪声对远程态制备过程的保真度的影响不同.对一个确定量子态,我们考察了消相干效应对其远程制备的影响. 相似文献
19.
《中国科学:物理学 力学 天文学(英文版)》2010,(11)
This paper has proposed a generalized quantum state sharing protocol of an arbitrary two-particle state using non-maximally GHZ states and generalized Bell state measurement.The sender Alice performs two-particle generalized Bell state measurements on her two particles in the state sharing process and the controller takes measurements on his particles and transfers the quantum information to the receiver with entanglement swapping by the cooperation of the other agents.It is found that the use of nonmaximally entangled state in quantum state sharing has enabled the secure sharing of the quantum state. 相似文献
20.
We present a scheme for symmetric controlled remote preparation of an arbitrary 2-qudit state form a sender to either of the two receivers via positive operator-valued measurement and pure entangled two-particle states. The first sender transforms the quantum channel shared by all the agents via POVM according to her knowledge of prepared state. All the senders perform singIe- or two-particle projective measurements on their entangled particles and the receiver can probabilisticaly reconstruct the original state on her entangled particles via unitary transformation and auxiliary qubit. The scheme is optimal as the probability which the receiver prepares the original state equals to the entanglement of the quantum channel. Moreover, it is more convenience in application than others as it requires only two-particle entanglements for preparing an arbitrary two-qudit state. 相似文献