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1.
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
2.
Controlled teleportation of high-dimension quantum-states with generalized Bell-state measurement
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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
3.
A three-party scheme for splitting an arbitrary unknown two-qutrit state is proposed, where two
non-maximally-entangled three-qutrit states are taken as the quantum
channel among three parties. With the sender's help, if and only if
both receivers collaborate together, they can securely share the
quantum state in a probabilistic way by introducing an ancilla qutrit and performing appropriate unitary operations. The relation between the success probability and coefficients characterizing the quantum channel is revealed. The security of the present scheme is analyzed and confirmed. Moreover, the generalization of the
three-party scheme to more-party case is also sketched. 相似文献
4.
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
5.
In this paper, we propose a protocol which can realize quantum cloning of an unknown tripartite entangled state and its orthogonal
complement state with assistance from a state preparer. The first stage of the protocol requires usual teleportation via three
entangled particle pairs as quantum channel. In the second stage of the protocol, the perfect copies and complement copies
of an unknown state can be produced with the assistance (through a tripartite projective measurement) of the state preparer.
We also present a scheme for the teleportation by using non-maximally entangled quantum channel. It is shown that the clones
and complement clones of the unknown state can be obtained with certain probability in the latter scheme. 相似文献
6.
This paper proposes a feasible scheme for the quantum teleportation
of tripartite entangled coherent states by using linear optical
devices such as beam splitters, phase shifters and photo detectors.
The scheme is based on the bipartite maximally entangled coherent
state and the tripartite entangled coherent state with bipartite
maximal entanglement as quantum channels. It shows that when the
mean number of photons is equal to 2, the total minimum of the average
fidelity for an arbitrary tripartite entangled state is 1-0.67×10 -3. 相似文献
7.
Jie Wu 《International Journal of Theoretical Physics》2010,49(2):324-333
By using positive operator-valued measure, I present a new tripartite scheme for realizing quantum state sharing of an arbitrary
unknown single-qubit pure state in either distant agent’s place. In this scheme, the sender averagely partitions its unknown
single-qubit state with a Greenberger-Horne-Zeilinger (GHZ)-basis measurement. Then by performing a proper positive operator-valued
measure, one agent can recover the splitter’s state in a probabilistic manner provided that he/she gets another one’s help.
Moreover, the total success probability of the scheme is also worked out. Finally, I concisely generalize the tripartite QSTS
scheme to a multiparty case. 相似文献
8.
XU ChunJie LIU YiMin ZHANG Wen & ZHANG ZhanJun School of Physics & Materials Science Anhui University Hefei China 《中国科学:物理学 力学 天文学(英文版)》2011,(2)
We put forward a generalized tripartite scheme for splitting an arbitrary 2-qubit pure state with three 2-qubit non-maximally en-tangled states as quantum channels.The scheme for the first time incorporates the Kraus measurement into quantum information splitting scheme.In contrast to the similar scheme using the same quantum channels and the ancilla-entangled measurement,our scheme is superior in terms of operation and complexity,success probability,resource consumption and effciency. 相似文献
9.
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
10.
Teleportation schemes with a tripartite entangled state in cavity QED are investigated. The schemes do not need Bell state measurements and the successful probabilities reach optimality. In addition, the schemes are insensitive to both the cavity decay and the thermal field. We first consider two teleportation schemes via a tripartite GHZ state.The first one is a controlled one for an unknown single-qubit state. The second scheme is teleportation of unknown two-atom entangled state. Then we consider teleporting of single-qubit arbitrary state via a tripartite W state. 相似文献
11.
XUE Zheng-Yuan YI You-Min CAO Zhuo-Liang 《理论物理通讯》2006,46(2):225-228
Teleportation schemes with a tripartite entangled state in cavity QED are investigated. The schemes do not need Bell state measurements and the successful probabilities reach optimality. In addition, the schemes are insensitive to both the cavity decay and the thermal field. We first consider two teleportation schemes via a tripartite GHZ state. The first one is a controlled one for an unknown single-qubit state. The second scheme is teleportation of unknown two-atom entangled state. Then we consider teleporting of single-qubit arbitrary state via a tripartite W state. 相似文献
12.
DAI Hong-Yi KUANG Le-Man LI Cheng-Zu 《理论物理通讯》2005,44(7)
We propose a scheme to probabilistically teleport an unknown arbitrary three-level two-particle state by using two partial entangled two-particle states of three-level as the quantum channel. The classical communication cost required in the ideal probabilistic teleportation process is also calculated. This scheme can be directly generalized to teleport an unknown and arbitrary three-level K-particle state by using K partial entangled two-particle states of three-level as the quantum channel. 相似文献
13.
Wen Zhang Yi-Min Liu Xue-Qin Zuo Zhan-Jun Zhang 《International Journal of Theoretical Physics》2009,48(10):2834-2842
A generalized tripartite scheme is proposed for splitting an arbitrary 2-qubit pure state by utilizing three 2-qubit entangled
states as quantum channels. In the scheme the splitter averagely partitions its unknown 2-qubit state between two agents and
either agent can recover the unknown state in a probabilistic manner with the other agent’s assistance. 32 unitary operations
used possibly and the total success probability of the scheme are worked out. Moreover, some discussions are made, especially
on the relation between the success probability and the entanglements in the quantum channels. 相似文献
14.
DAIHong-Yi KUANGLe-Man LICheng-Zu 《理论物理通讯》2005,44(1):40-44
We propose a scheme to probabilistically teleport an unknown arbitrary three-level two-particle state by using two partial entangled two-particle states of three-level as the quantum channel. The classical communication cost required in the ideal probabilistic teleportation process is also calculated. This scheme can be directly generalized to teleport an unknown and arbitrary three-level K-particle state by using K partial entangled two-particle states of three-level as the quantum channel. 相似文献
15.
YUAN Hong-Chun QI Kai-Guo 《理论物理通讯》2005,44(8)
We mostly investigate two schemes. One is to teleport a multi-mode W-type entangled coherent state using a peculiar bipartite entangled state as the quantum channel different from other proposals. Based on our formalism,teleporting multi-mode coherent state or squeezed state is also possible. Another is that the tripartite entangled state is used as the quantum channel of controlled teleportation of an arbitrary and unknown continuous variable in the case of three participators. 相似文献
16.
YUAN Hong-Chun QI Kai-Guo 《理论物理通讯》2005,44(2):269-273
We mostly investigate two schemes. One is to teleport a multi-mode W-type entangled coherent state using a peculiar bipartite entangled state as the quantum channel different from other proposals. Based on our formalism,teleporting multi-mode coherent state or squeezed state is also possible. Another is that the tripartite entangled state is used as the quantum channel of controlled teleportation of an arbitrary and unknown continuous variable in the case of three participators. 相似文献
17.
Xue-qin Zuo Yi-min Liu Zi-yun Zhang Zhan-jun Zhang 《International Journal of Theoretical Physics》2009,48(7):1950-1956
We propose a tripartite scheme for bisplitting an arbitrary single-qubit quantum information (QI) by using a class of asymmetric
three-qubit W state as quantum channels. In the scheme, the sender Alice first performs a Bell-state measurement on her two
qubits and then publishes her measurement result via a public classical channel. Based on Alice’s message, if the two receivers
Bob and Charlie collaborate together, they can retrieve the QI, i.e., they can deterministically recover the QI in one receiver’s
site by first performing a two-qubit unitary operation and then executing a single-qubit unitary operation. Afterwards, we
sketch the extension of the single-qubit QI splitting to an arbitrary N-qubit QI splitting. 相似文献
18.
We propose a scheme for cloning unknown two-particle entangled state and its orthogonal complement state with assistance from
a state preparer. Two stages were included in this scheme. The first stage requires usual teleportation by using a one-dimensional
non-maximally four-particle cluster state as quantum channel, after Alice’s (the state sender) Bell measurement, Bob (the
state receiver) can get the original state with certain probability. In the second stage, after having received Victor’s (the
state preparer) classical message, the perfect copies and complement copies of an unknown state can be produced in Alice’s
place, the probability of Alice to get the original state or its orthogonal complement state are calculated. Assisted cloning
of an arbitrary unknown two-particle entangled state is discussed in the latter scheme. 相似文献
19.
We construct several distinct schemes for tripartite Quantum state sharing (QSTS) of arbitrary single- and two-qubit states. Our schemes use genuinely entangled five-qubit state that has recently been introduced by Brown et al. [J. Phys. A 38 1119 (2005)] as the quantum channel. The Bell-state measurements and the single-qubit measurement are needed in our schemes. In comparison with the QSTS scheme using the same quantum channel [Phys. Rev. A 77 (2008) 032321], not joint measurement, which makes this scheme simpler than the latter. 相似文献
20.
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