共查询到20条相似文献,搜索用时 46 毫秒
1.
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
2.
We present an (n,n) threshold quantum secret sharing scheme of secure direct communication using Greenberger-Horne-Zeilinger state and teleportation.After ensuring the security of the quantum channel,the sender encodes the secret message directly on a sequence of particle states and transmits it to the receivers by teleportation.The receivers can recover the secret message by combining their measurement results with the sender's result.If a perfect quantum channel is used,our scheme is completely secure because the transmitting particle sequence does not carry the secret message.We also show our scheme is secure for noise quantum channel. 相似文献
3.
Y. B. Sheng F. G. Deng 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2008,48(2):279-284
We present an efficient and economic scheme for five-party quantum
state sharing of an arbitrary m-qubit state with 2m three-particle
Greenberger-Horne-Zeilinger (GHZ) states and three-particle
GHZ-state measurements. It is more convenient than other schemes as
it only resorts to three-particle GHZ states and three-particle
joint measurement, not five-particle entanglements and five-particle
joint measurements. Moreover, this symmetric scheme is in principle
secure even though the number of the dishonest agents is more than
one. Its total efficiency approaches the maximal value. 相似文献
4.
DONG Jian TENG Jian-Fu WANG Shu-Yan 《理论物理通讯》2009,51(5):823-827
In this paper, we present a scheme for teleporting multi-qudit quantum state, from the sender Alice to the receiver Charlie via many controllers Bobs, whose control parameters are obtained using entanglement swapping of maximally d-dimensional EPR pair. In our scheme, Yang's qutrit controlled teleportation protocol [Commun. Theor. Phys. 49 (2008) 338] based on Bell-state entanglement swapping is generalized to the qudit case. The scheme of multi-qudit owns the advantage of having higher code capacity and better security than that of multi-qutrit. 相似文献
5.
A controlled teleportation scheme is presented. In this
scheme, quantum information of a single-qubit state or an entangled
two-qubits state is transmitted from a sender (Alice) to a receiver
(Charlie) via a four-particle cluster state under the control of the
supervisor (Bob). The feature of this scheme is that the teleportation
between the sender and the receiver depends on the control of the
supervisor. 相似文献
6.
7.
R. H. Shi L. S. Huang W. Yang H. Zhong 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2010,57(2):287-291
We present an asymmetric scheme for five-party quantum state sharing of an arbitrary m-qubit state with the maximally entangled
states of two-particle and three-particle. It involves two-particle Bell-basis or three-particle GHZ-basis measurements, rather
than five-particle entanglements and five-particle joint measurements, which makes it more convenient in a practical application
than some previous schemes. In addition, except that the designated recover of the quantum secret just keeps m particles,
other agents only hold one particle in their hands respectively, and thus they only need perform a single-particle measurement
on the respective particle with the basis X. Its intrinsic efficiency for qubits approaches 100%, and the total efficiency
really approaches the maximal value. 相似文献
8.
In this paper, we propose a mesh-topology-based multi-hop teleportation scheme for a quantum network. By using the proposed scheme, quantum communication can be realized between two arbitrary nodes, even when they do not share a direct quantum channel. Einstein–Podolsky–Rosen pairs are used as quantum channels. The source node (initial sender) and all intermediate nodes make Bell measurements independently. They send the results to the destination node (final receiver) by classical channels. The quantum state can be determined from the Bell measurement result, and only the destination node is required for simple unitary transformation. This method of simultaneous measurement contributes significantly to quantum network by reducing the hop-by-hop transmission delay. 相似文献
9.
A kind of three-particle entangled state is applied as quantum channel of the controlled quantum teleportation of a one-particle unknown state. The one-particle unknown state is transmitted from the sender to the recipient under the control of the supervisor. After the sender makes Bell-state measurement and the supervisor performs von Neumann measurement, the recipient carries out unitary transformation on his own particle depending on classical information from the sender and the supervisor. The teleportation cannot be completed successfully by the recipient if the supervisor does not agree to cooperate. The roles of the recipient and the supervisor may be exchanged in this scheme. The scheme is flexible and feasible because the sequence of manipulation of the sender and the supervisor may be exchanged and only simple unitary transformation is included. 相似文献
10.
Controlled Quantum Teleportation of a One-Particle Unknown State via a Three-Particle Entangled State 总被引:1,自引:0,他引:1
XIU Xiao-Ming DONG Li GAO Ya-Jun CHI Feng 《理论物理通讯》2007,48(2):261-263
A kind of three-particle entangled state is applied as quantum channel of the controlled quantum teleporration of a one-particle unknown state. The one-particle unknown state is transmitted from the sender to the recipient under the control of the supervisor. After the sender makes Bell-state measurement and the supervisor performs von Neumann measurement, the recipient carries out unitary transformation on his own particle depending on classical information from the sender and the supervisor. The teleportation cannot be completed successfully by the recipient if the supervisor does not agree to cooperate. The roles of the recipient and the supervisor may be exchanged in this scheme. The scheme is flexible and feasible because the sequence of manipulation of the sender and the supervisor may be exchanged and only simple unitary transformation is included. 相似文献
11.
JIANG Wei-Xing FANG Jian-Xing ZHU Shi-Qun SHA Jin-Qiao 《理论物理通讯》2007,47(6):1045-1048
A scheme for controlled teleportation of an unknown N-qubit entangled GHZ state from the sender Alice to the distant receiver Bob is proposed. And m-qubit GHZ state is sufficient for the task of control by m spatially- separated supervisors. Conditioned on the local operations executed by all participants, Bob can faithfully restore the original state by performing relevant unitary transformations with the aid of some classical message about measurement results. Anyone's absence will absolutely lead to the failure of teleportation. 相似文献
12.
13.
Controlled teleportation of high-dimension quantum-states with generalized Bell-state measurement 下载免费PDF全文
In this paper a scheme for controlled teleportation of arbitrary
high-dimensional unknown quantum states is proposed by using the generalized
Bell-basis measurement and the generalized Hadamard transformation. As two
special cases, two schemes of controlled teleportation of an unknown
single-qutrit state and an unknown two-qutrit state are investigated in
detail. In the first scheme, a maximally entangled
three-qutrit state is used as the quantum channel, while in the second
scheme, an entangled two-qutrit state and an entangled three-qutrit state are
employed as the quantum channels. In these schemes, an unknown qutrit state
can be teleported to either one of two receivers, but only one of them can
reconstruct the qutrit state with the help of the other. Based on the case
of qutrits, a scheme of controlled teleportation of an unknown qudit state
is presented. 相似文献
14.
Scheme for teleportation of an unknown atomic state via a cluster state in cavity QED 总被引:1,自引:0,他引:1 下载免费PDF全文
This paper proposes an experimentally feasible scheme for teleportation of an unknown two-atom entangled state, where a cluster state is used as the quantum channel. This scheme does not need any joint measurement. In addition, the successful probability and fidelity of teleportation can both reach 1.0. The current scheme can be realized within the current experimental technology. 相似文献
15.
This paper proposes an experimentally feasible scheme for
teleportation of an unknown two-atom entangled state, where a
cluster state is used as the quantum channel. This scheme does not
need any joint measurement. In addition, the successful probability
and fidelity of teleportation can both reach 1.0. The current scheme
can be realized within the current experimental technology. 相似文献
16.
CAO Zhuo-Liang LI Da-Chuang 《理论物理通讯》2008,49(2):369-372
An experimentally feasible scheme for teleportation of an unknown two-atom entangled state is proposed. Our scheme uses a duster state as the quantum channel, where we do not need any joint Bell-state measurement. Moreover the successful probability and fidelity of teleportation can both reach 1.0. The current scheme can be realized within the current experimental technology. 相似文献
17.
我们提出了一个控制的量子隐形传态方案。在这方案中,发送方Alice 在监督者Charlie的控制下以他们分享的三粒子纠缠态作为量子通道将二能级粒子未知态的量子信息忠实的传给了遥远的接受方Bob。我们还提出了借助此传态的控制的量子安全直接通信方案。在保证量子通道安全的情况下, Alice直接将秘密信息编码在粒子态序列上,并在Charlie控制下用此传态方法传给Bob。Bob可通过测量他的量子位读出编码信息。由于没有带秘密信息的量子位在Alice 和Bob之间传送,只要量子通道安全, 这种通信不会泄露给窃听者任何信息, 是绝对安全的。这个方案的的特征是双方通信需得到第三方的许可。 相似文献
18.
We propose a scheme for realizing a controlled teleportation of random
$M$-qudit quantum information under the control of $N$ agents. The resource
consumption includes a prearranged $(2M + N + 1)$-qudit entangled quantum
channel and $(2M + N + 1)\log _2 d$-bit classical communication. And the
quantum operations used in the teleportation process are a series of
generalized Bell-state measurements, single-qudit measurements, qudit
$H$-gates, qudit-Pauli gates and qudit phase gates. It is shown that the
original state can be restored by the receiver only on condition that
all the agents work in collaboration with each others.
If one agent does not cooperate with the other, the original
state cannot be fully recovered. 相似文献
19.
A controlled quantum teleportation scheme of an N-particle unknown state via three-particle W1 states 下载免费PDF全文
In this paper a controlled quantum teleportation scheme of an N-particle unknown state is proposed when N groups of three-particle W1 states are utilized as quantum channels. The quantum information of N-particle unknown state is transmitted from the sender to the recipient under the control of all supervisors. It can be realized with a certain probability. After the sender makes Bell-state measurements and the supervisors perform the computational basis measurements, the recipient will introduce auxiliary particles and carry out unitary transformations depending on classical information from the sender and the supervisors. Finally, the computational basis measurement will be performed by the recipient to confirm whether the teleportation succeeds or not. The successful completion of the scheme relies on all supervisors' cooperation. In addition, the fidelity and security of the scheme are discussed. 相似文献
20.
A scheme for controlled teleportation of an arbitrary two-particle state using a maximally entangled EPR pair 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 receiver needs to introduce an auxiliary qubit, and performs aseries of appropriate unitary transformations on his particles.
The original state can be teleported successfully with theprobability 2cos2θ. 相似文献