共查询到20条相似文献,搜索用时 16 毫秒
1.
In this paper, we study quantum teleportation of atomic states via a
hybrid entangled state (HES) involving an atom and a cavity field.
And we investigate how to implement controlled phase (CP) gates
between atomic internal states and coherent states of cavity field.
We also discuss the methods of distinguishing coherent states
|±α〉in a cavity. Finally, a brief discussion about
the feasibility of this scheme in experiment is presented. 相似文献
2.
In this paper, we study quantum teleportation of atomic states via a hybrid entangled state (HES) involving an atom and a cavity field. And we investigate how to implement controlled phase (CP) gates between atomic internal Finally, a brief discussion about the feasibility of this scheme in experiment is presented. 相似文献
3.
We propose a quantum teleportation scheme for tripartite entangled coherent state (ECS) with continuous variable. Our scheme is feasible and economical in the sense that we need only linear optical devices such as beam splitters, phase shifters and photon detectors and employ three bipartite maximally ECSs as quantum channels. We also generalize the tripartite scheme into multipartite ease and calculate the minimum average fidelity for the schemes in tripartite and multipartite cases. 相似文献
4.
We propose two physical schemes, which can teleport unknown atomic entangled states from user A (Alice) to user B (Bob) via GHZ class states as quantum channel The two schemes are both based on cavity QED techniques. In the two schemes, teleportation and distillation procedures can be realized simultaneously. The second teleportation scheme is more advantageous than the first one. 相似文献
5.
Ti-Hang Zhang Min Jiang Xu Huang Min Wan 《International Journal of Theoretical Physics》2014,53(4):1150-1158
In this paper, we present a generalized approach to faithfully teleport an unknown state of a multi-qudit system involving multi spatially remote agents via various probabilistic channels. In a quantum teleportation network, there are generally multi spatially remote relay agents between a sender and a distant receiver. With the assistance of the relay agents, it is possible to directly construct a deterministic channel between the sender and the distant receiver. In our scheme, different from previous probabilistic teleportation protocols, the integrity of the unknown multi-qudit state could be maintained even when the construction of faithful channel fails. Our results also show that the required auxiliary particle resources, local operations and classical communications are considerably reduced for the present purpose. 相似文献
6.
We describe a protocol for quantum state teleportation via mixed entangled pairs. With the help of an ancilla, near-perfect teleportation might be achieved. For pure entangled pairs, perfect teleportation might be achieved with a certain probability without using an ancilla. The protocol is generalized to teleportation of multiparticle states and quantum secret sharing. 相似文献
7.
We propose a protocol for teleportation of arbitrary mixture of diagonal Bell states, it is shown that the channel can be constructed with either pure maximally entangled states or mixed bound entangled states. We also present protocols to realize the controlled teleportation of mixture of diagonal Bell states via multi-particle mixed states. Our results show that bound entangled states are also important and useful resources in quantum communication tasks. 相似文献
8.
QIAN Yi XU Jing-Bo 《理论物理通讯》2008,49(1):73-76
We study the entanglement of the para-Bose entangled coherent states by adopting the entanglement of formation and propose a scheme of probabilistic teleportation via para-Bose entangled coherent states. It is found that the mean fidelity of the scheme increases with the decrease of the para-Bose parameter ho in the case of non-maximally entangled para-Bose entangled coherent states. 相似文献
9.
Teleportation of a qubit with two partially entangled qubit states linking three nodes as quantum channels is extensively studied via the usual ancilla method. With the method two realization approaches, i.e., the node progression approach and the global accumulation approach, are presented. Their resource consumptions, operation complexities, and el~ciencies axe evaluated and compared. It is found that the latter approach is better than the former one besides the error is partially self-corrected. The latter approach is further improved so that two merits are resultant. The improved version is compared with a similar protocol [M.Y. Wang and F.L. Yah, Eur. Phys. J. D 54 (2009) 111]. Their merits and additional costs are exposed. 相似文献
10.
Non-Maximally Entangled Controlled Teleportation Using Four Particles Cluster States 总被引:1,自引:0,他引:1
Yi-You Nie Zhi-Hui Hong Yi-Bin Huang Xiao-Jie Yi Song-Song Li 《International Journal of Theoretical Physics》2009,48(5):1485-1490
A new scheme for controlled teleportation with the help of a four-qubit cluster state is proposed. In this scheme, a four-particle
cluster state is shared by a sender, a controller and a receiver. The sender first performs a Bell-basis measurement on the
qubits at hand, and the controller performs measurements under a non-maximally entangled Bell-basis after he knows the sender’s
measurement result. Then the receiver introduces an auxiliary qubit and performs some appropriate unitary transformations
on his qubits. Quantum teleportation is realized after the receiver performs a local measurement on the auxiliary qubit and
an appropriate unitary transformation on his qubit. 相似文献
11.
Teleportation of a qubit with two partially entangled qubit states linking three nodes as quantum channels is extensively studied via the usual ancilla method. With the method two realization approaches, i.e., the node progression approach and the global accumulation approach, are presented. Their resource consumptions, operation complexities, and efficiencies are evaluated and compared. It is found that the latter approach is better thanthe former one besides the error is partially self-corrected. The latter approach is further improved so that two merits are resultant. The improved version is compared with a similar protocol [M.Y. Wang and F.L. Yan, Eur. Phys. J. D 54 (2009) 111]. Their merits and additional costs are exposed. 相似文献
12.
Jiahua Wei Hong-Yi Dai Lei Shi Shanghong Zhao Ming Zhang 《International Journal of Theoretical Physics》2018,57(10):3104-3111
In this paper, an efficient proposal for quantum controlled teleporatation of arbitrary multi-qubit states is presented via three-qubit non-maximally entangled states. The successful probability is viewed as one of the most important performance parameters for quantum teleportation. The significant advantage of our scheme is that the successful probability is independent of the coefficients of partially entangled states, and is always equal to 100% in spite of using non-maximally quantum channel. From the concrete implementation processes of this proposal, it could be found that only the usual Bell-state measurement, simple single-qubit projective measurement and common single-qubit local unitary operations, of which the physical realization has been widely explored, need to be performed without the introduction of auxiliary particles. 相似文献
13.
ZHANG Li-Hua XUE Zheng-Yuan YANG Ming CAO Zhuo-Liang 《理论物理通讯》2006,46(4):610-612
We present a physical scheme to teleport an unknown atomic entangled state via cavity decay. In the teleportation process, four-particle Greenberger-Horne-Zeilinger (GHZ) state is used as quantum channel, and two unknown entangled atoms and two of four atoms in the four-particle GHZ state are trapped in four leaky cavities, respectively. Based on the joint detection of the photons leak out from the four cavities, we can teleport an unknown entangled state to two other remote atoms with certain probability and high fidelity. 相似文献
14.
FAN Hong-Yi LIANG Xian-Ting 《理论物理通讯》2005,44(11)
A quantum teleportation scheme to teleport a kind of tripartite entangled states of continuous variables by using a quantum channel composed of three bipartite entangled states is proposed. The joint Bell measurement is feasible because the bipartite entangled states are complete and the squeezed state has a natural representation in the entangled state basis. The calculation is greatly simplified by using the Schmidt decomposition of the entangled states. 相似文献
15.
FAN Hong-Yi LIANG Xian-Ting 《理论物理通讯》2005,44(5):833-836
A quantum teleportation scheme to teleport a kind of tripartite entangled states of continuous variables by using a quantum channel composed of three bipartite entangled states is proposed. The joint Bell measurement is feasible because the bipartite entangled states are complete and the squeezed state has a natural representation in the entangled state basis. The calculation is greatly simplified by using the Schmidt decomposition of the entangled states. 相似文献
16.
Jin-wei Wang Lan Shu Zhi-wen Mo Zhi-hua Zhang 《International Journal of Theoretical Physics》2014,53(8):2867-2873
In this paper, we propose a controlled teleportation scheme which communicates an arbitrary ququart state via two sets of partially entangled GHZ state. The necessary measurements and operations are given detailedly. Furthmore the scheme is generalized to teleport a qudit state via s sets of partially entangled GHZ state. 相似文献
17.
XIU Xiao-Ming DONG Li GAO Ya-Jun CHI Feng 《理论物理通讯》2009,51(3):429-432
The sender shares six-particle maximally entangled states as quantum channel with the receiver. If the quantum channel is secure, the sender performs projective measurements and tells the measurement outcome to the receiver. The receiver performs the unitary transformations and makes projective measurements on his particles to obtain the secret information. Using teleportation, the transmission of three-qubit secret information can be completed in each quantum channel 相似文献
18.
We present a physical scheme to teleport an unknown atomic entangled state via cavity decay. In the teleportation process, four-particle Greenberger-Horne-Zeilinger (GHZ) state is used as quantum channel, and two unknown entangled atoms and two of four atoms in the four-particle GHZ state are trapped in four leaky cavities,respectively. Based on the joint detection of the photons leak out from the four cavities, we can teleport an unknown entangled state to two other remote atoms with certain probability and high fidelity. 相似文献
19.
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
20.
HU Li-Yun ZHOU Nan-Run 《理论物理通讯》2007,47(5):805-810
Based on the coherent entangled state |a, x〉 we introduce the squeezed entangled state (SES). Then we propose a teleportation protocol for the SES by using Einstein-Podolsky-Rosen entangled state |η〉 as a quantum channel. The calculation is greatly simplified by virtue of the Schmidt decompositions of both |a, x〉 and |η〉. Any bipartite states that can be expanded in terms of |a, x〉 may be teleported in this way due to the completeness of |a, x〉. 相似文献