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1.
Probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel and its application in quantum state sharing 总被引:1,自引:0,他引:1
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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. 相似文献
2.
Several teleportation schemes of an arbitrary unknown multi-particle state via different quantum channels
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We first provide four new schemes for two-party quantum teleportation of an arbitrary unknown multi-particle state by using three-, four-, and five-particle states as the quantum channel, respectively. The successful probability and fidelity of the four schemes reach 1. In the first two schemes, the receiver can only apply one of the unitary transformations to reconstruct the original state, making it easier for these two schemes to be directly realized. In the third and fourth schemes, the sender can preform Bell-state measurements instead of multipartite entanglement measurements of the existing similar schemes, which makes real experiments more suitable. It is found that the last three schemes may become tripartite controlled teleportation schemes of teleporting an arbitrary multi-particle state after a simple modification. Finally, we present a new scheme for three-party sharing an arbitrary unknown multi-particle state. In this scheme, the sender first shares three three-particle GHZ states with two agents. After setting up the secure quantum channel, an arbitrary unknown multi-particle state can be perfectly teleported if the sender performs three Bell-state measurements, and either of two receivers operates an appropriate unitary transformation to obtain the original state with the help of other receiver's three single-particle measurements. The successful probability and fidelity of this scheme also reach 1. It is demonstrated that this scheme can be generalized easily to the case of sharing an arbitrary unknown multi-particle state among several agents. 相似文献
3.
Zi-yun Zhang Kuang-wei Xiong Xue-qin Zuo Wen Zhang 《International Journal of Theoretical Physics》2013,52(8):2537-2545
In Nie et al. (Int. J. Theor. Phys. 50: 2526, 2011), authors put forward a cavity QED scheme for deterministic quantum state sharing (QSTS) of an arbitrary two-atom state. They claimed that, the quantum channel of the QSTS scheme is a six-atom cluster state. After simple calculation, one can see that the quantum channel they used is a direct product of two three-atom GHZ states. In this paper, we propose a cavity QED scheme for QSTS of an arbitrary two-atom state via a six-atom cluster state channel. In our scheme, two two-atom Bell state measurements are transformed into the discrimination of single-atom product states. Moreover, the two-atom unitary operation is changed to single-qubit unitary operations. Our scheme is insensitive to the cavity decay. The necessary time for the scheme is much shorter than the Rydberg-atom lifespan, therefore atom decays do not need to be considered. 相似文献
4.
Shu-Xin Lv Zheng-Wei Zhao Ping Zhou 《International Journal of Theoretical Physics》2018,57(1):148-158
We present a scheme for multiparty-controlled joint remote preparation of an arbitrary m-qudit state by using d-dimensional Greenberger-Horne-Zeilinger (GHZ) states as the quantum channel. An arbitrary m-qudit state can be transmitted from two senders to a remote receiver in a quantum communication network under the controller’s control. The senders perform m-qudit measurements according to their information of prepared state, the controllers only need perform single-particle projective measurements. The receiver can prepare the original state on his quantum system by performing corresponding unitary operation according the measurement results of the senders and controllers. It is shown that an arbitrary m-qudit state in general form can be controlled joint remote prepared if and only if the receiver cooperates with all the senders and controllers. 相似文献
5.
In the paper we generalize the standard teleportation to the conclusive teleportation case which can teleportan arbitrary d-dimensional N-particle unknown state via the partially entangled quantum channel. We show that onlyif the quantum channel satisfies a constraint condition can the most general d-dimensional N-particle unknown state beperfect conclusively teleported. We also present a method for optimal conclusively teleportation of the N-particle statesand for constructing the joint POVM which can discern the quantum states on the sender's (Alice's) side. Two typicalexamples are given so that one can see how our method works. 相似文献
6.
A scheme for quantum state sharing of an arbitrary m-qudit state is proposed with two-qudit entanglements and generalized Bell-state (GBS) measurements. In this scheme, the sender Alice should perform m two-particle GBS measurements on her 2m qudits, and the controllers also take GBS measurements on their qudits and transfer their quantum information to the receiver with entanglement swapping if the agents cooperate. We discuss two topological structures for this quantum state sharing scheme, a dispersive one and a circular one. The former is better at the aspect of security than the latter as it requires the number of the agents who should cooperate for recovering the quantum secret larger than the other one. 相似文献
7.
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
8.
We propose a scheme for sharing an arbitrary unknown two-qubit state among three parties by using a four-qubit cluster-class state and a Bell state as a quantum channel. With a quantum controlled phase gate (QCPG) operation and a local unitaryoperation, any one of the two agents has the access to reconstruct the original state if he/she collaborates with the other one, whilst individual agent obtains no information. As all quantum resource can be used to carry the useful information, the intrinsic efficiency of qubits approaches the maximal value. Moreover, the present scheme is more feasible with present-day technique. 相似文献
9.
Robert W. Spekkens 《Foundations of Physics》2014,44(11):1125-1155
In order to claim that one has experimentally tested whether a noncontextual ontological model could underlie certain measurement statistics in quantum theory, it is necessary to have a notion of noncontextuality that applies to unsharp measurements, i.e., those that can only be represented by positive operator-valued measures rather than projection-valued measures. This is because any realistic measurement necessarily has some nonvanishing amount of noise and therefore never achieves the ideal of sharpness. Assuming a generalized notion of noncontextuality that applies to arbitrary experimental procedures, it is shown that the outcome of a measurement depends deterministically on the ontic state of the system being measured if and only if the measurement is sharp. Hence for every unsharp measurement, its outcome necessarily has an indeterministic dependence on the ontic state. We defend this proposal against alternatives. In particular, we demonstrate why considerations parallel to Fine’s theorem do not challenge this conclusion. 相似文献
10.
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. 相似文献
11.
Yi-you Nie Ming-huang Sang Yuan-hua Li Jun-chang Liu 《International Journal of Theoretical Physics》2011,50(5):1367-1371
We propose a scheme for splitting an arbitrary two-qubit state among three parties by using a six-qubit cluster-class state
as a quantum channel. Based on two Bell-state measurements (BSMs) and a two-qubit projective measurement, any one of the two
agents can reconstruct the original state if he/she collaborates with the other one, whilst individual agent obtains no information. 相似文献
12.
Utilizing three non-maximally entangled qutrit pairs as quantum channels, we first propose a generalized tripartite scheme for sharing an arbitrary two-qutrit state with generalized Bell-state measurements. In the scheme if and only if the two recipients collaborate together, they can recover the split qutrit state with the probability determined uniquely by the smallest coefficients of the non-maximally entangled pairs. Afterwards, we further extend the scheme for sharing an arbitrary 2n-qudit state by taking 3n non-maximally entangled qudit pairs as quantum channels. Moreover, the scheme success probability relative to the inherent entanglement in quantum channels and its structure is simply discussed. 相似文献
13.
Z.-Y. Wang H. Yuan S.-H. Shi Z.-J. Zhang 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2007,41(2):371-375
A three-party scheme for securely sharing an
arbitrary unknown single-qutrit state is presented. Using a
generalized Greenberger-Horne-Zeilinger (GHZ) state as the quantum
channel among the three parties, the quantum information (i.e.
the qutrit state) from the sender can be split in such a way that
the information can be recovered if and only if both receivers
collaborate. A generalization of the scheme
to multi-party case is also sketched. 相似文献
14.
提出了一个基于高维2m+1粒子纠缠态的任意m粒子态量子可控离物传态方案,发送方Alice对需传送的未知态量子系统和手中的纠缠粒子执行m个广义Bell基测量,控制方执行广义X基测量,依据预先共享量子纠缠态非定域相关性,接收方对手中的粒子执行相应的幺正操作就可以重建原来未知量子态.与其他方案相比,方案减少了任意高维多粒子态可控离物传送所需传送粒子数.我们进一步讨论了基于纯纠缠信道的概率量子可控离物传态方案,通过与发送方和控制方合作,接收方只需对手中的纠缠粒子和引入的附加粒子执行联合幺正演化和投影测量,就可以在他的粒子上概率的重建原来的未知量子态,最后,方案计算讨论了基于纯纠缠态量子可控离物传态成功概率与信道纠缠度之间的关系. 相似文献
15.
We introduce a version of the chained Bell inequality for an arbitrary number of measurement outcomes and use it to give a simple proof that the maximally entangled state of two d-dimensional quantum systems has no local component. That is, if we write its quantum correlations as a mixture of local correlations and general (not necessarily quantum) correlations, the coefficient of the local correlations must be zero. This suggests an experimental program to obtain as good an upper bound as possible on the fraction of local states and provides a lower bound on the amount of classical communication needed to simulate a maximally entangled state in dxd dimensions. We also prove that the quantum correlations violating the inequality are monogamous among nonsignaling correlations and, hence, can be used for quantum key distribution secure against postquantum (but nonsignaling) eavesdroppers. 相似文献
16.
The famous quantum no-cloning theorem [Nature 299(1952)802] forbids replication of an arbitrary unknown quantum state. But it leaves open the follorc-ing question: If the state is not completely arbitrary, but secretly chosen from a certain set $ = {|Ψ1>,| Ψ2>,...,|Ψn>}, whether is the cloning possible? It is proved that the states from the set $ = {|Ψ1>,| Ψ2>,...,|Ψn>} can be faithfully cloned by a general unitary-reduction operation in a probabilistic fashion if and only if |Ψ1>,| Ψ2>,... and |Ψn> are linearly-independent. 相似文献
17.
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
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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
18.
Qi-Liang He 《Optics Communications》2011,284(14):3649-3653
We investigate the influence of nonlinear Kerr-like medium and dipole-dipole interaction on the dynamics of quantum discord in Tavis-Cummings model with phase decoherence. We show that in the resonance case (i) atom-field quantum discord rapidly decays with phase decoherence and doesn't exist the stationary state quantum discord, but the stationary state quantum discord appears if we choose the suitable values of Kerr coefficient χ and dipole-dipole interaction Ω, (ii) the quantum discord of two atoms survives in the stationary state and the amount of stationary state quantum discord could be improved by adjusting the values of χ and Ω. In the non-resonance case, the arbitrary bipartite quantum discord of the system could not be completely destroyed by the phase decoherence and can be improved by applying nonlinear Kerr-like medium and dipole-dipole interaction. 相似文献
19.
Ming-Xing Luo Xiu-Bo Chen Song-Ya Ma Yi-Xian Yang Zheng-Ming Hu 《International Journal of Theoretical Physics》2010,49(6):1262-1273
In this paper, we propose a scheme to remotely prepare an arbitrary two-qubit state from one sender to either of two receivers.
Two cases of the prepared quantum state, an arbitrary two-qubit state with real coefficients and complex coefficients, are
considered. Firstly, one single EPR pair and a GHZ state are used as the quantum channel. Then the present scheme is extended
to some partially entangled states as the quantum channel. To design these schemes, some useful and general measurement bases
have been constructed. The successful probability and classical communication cost of these schemes are also calculated to
weigh the efficiency and cost. 相似文献
20.
Bo Zhang Xing-tong Liu Jian Wang Chao-jing Tang 《International Journal of Theoretical Physics》2016,55(3):1601-1611
Recently Zhu (Int. J. Theor. Phys. 53, 4095, 2014) had shown that using GHZ-like states as quantum channel, it is possible to teleport an arbitrary unknown two-qubit state. We investigate this channel for the teleportation of an arbitrary N-qubit state. The strict proof through mathematical induction is presented and the rule for the receiver to reconstruct the desired state is explicitly derived in the most general case. We also discuss that if a system of quantum secret sharing of classical message is established, our protocol can be transformed to a N-qubit perfect controlled teleportation scheme from the controller’s point of view. 相似文献