共查询到20条相似文献,搜索用时 15 毫秒
1.
LI Da-Chuang ZHENG Xiao-Hu DONG Ping CAO Zhuo-Liang 《理论物理通讯》2008,49(5):1195-1198
An experimentally feasible scheme for teleportation of an arbitrary unknown entangled state is proposed. Our scheme is based on Josephson charge qubits, where we do not need any joint measurement. Moreover the successful probability and fidelity of the teleportation can both reach 1.0. The current scheme can be realized within the current experimental technology. 相似文献
2.
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
3.
We present an optical scheme to almost completely teleport a bipartite entangled coherent state using a four-partite cluster-type entangled coherent state as quantum channel. The scheme is based on optical elements such as beam splitters, phase shifters, and photon detectors. We also obtain the average fidelity of the teleportation process. It is shown that the average fidelity is quite close to unity if the mean photon number of the coherent state is not too small. 相似文献
4.
DAI Hong-Yi ZHANG Ming LI Cheng-Zu 《理论物理通讯》2008,49(4):891-894
We present a scheme for probabilistically teleporting an unknown three-level bipartite entangled state by using a partial entangled three-level bipartite state as quantum channel This scheme can be directly generalized to probabilistically teleport an unknown three-level k-particle entangled state by a partial three-level bipartite entangled state. A11 kinds of unitary transformations are given in detail We calculate the successful total probability and the total classical communication cost required for this scheme. 相似文献
5.
We present an optical scheme to almost completely teleport a bipartite entangled coherent state using a four-partite cluster-type entangled coherent state as quantum channel. The scheme is based on optical elements such as beam splitters, phase shifters, and photon detectors. We also obtain the average fidelity of the teleportation process. It is shown that the average fidelity is quite close to unity if the mean photon number of the coherent stateis not too small. 相似文献
6.
LIN Xiu LI Hong-Cai YANG Rong-Can HUANG Zhi-Ping 《理论物理通讯》2008,49(3):621-624
An alternative scheme is proposed for teleportation of an unknown atomic-entangled state. The scheme is based on the resonant interaction of a two-mode cavity field with a A-type three-level atom. In contrast with the previously proposed scheme of [Commun. Theor. Phys. 47 (2007) 253], the present scheme is ascendant, since the fidelity is 1.0 in principle similarly without the Bell-state measurement. The scheme may be generalized to not only the teleportation of the cavity-mode-entangled-state but also the teleportation of the multi-atomic entangled states included in generalized GHZ states. And the scheme is experimentally feasible based on the current cavity QED technique. 相似文献
7.
Teleportation of Two-Particle Entangled State via Cluster State 总被引:5,自引:0,他引:5
In this paper,two schemes for teleporting an unknown two-particle entangled state from the sender (Alice)to the receiver (Bob) via a four-particle entangled cluster state are proposed.In these two schemes,the unknown twoparticle entangled state can be teleported perfectly.The successful probabilities and fidelities of the schemes can reach unity. 相似文献
8.
A scheme for approximately and conditionally teleporting an unknown atomic-entangled state in cavity QED is proposed.It is the novel extension of the scheme of [Phys.Rev.A 69 (2004) 064302],where the state to be teleported is an unknown atomic state and where only a time point of system evolution and the corresponding fidelity implementing the teleportation are given.In fact,there exists multi-time points and the corresponding fidclities,which are shown in this paper and then are used to realize the approximate and conditional teleportation of the unknown atomic-entangled state.Naturally,our scheme does not involve the Bell-state measurement or an additional atom,which is required in the Bell-state measurement,only requiring one single-mode cavity.The scheme may be generalized to not only the teleportation of the cavity-mode-entangled-state by means of a single atom but also the teleportation of the unknown trapped-ion-entangled-state in a linear ion trap and the teleportation of the multi-atomic entangled states included in generalized GHZ states. 相似文献
9.
We propose two schemes for quantum dense coding without Bell states measurement. One is deterministic, the other is probabilistic. In the deterministic scheme, the initial entangled state will be not destructed. In the proba-bilistic scheme, the initial unknown nonmaximal entangled state will be transformed into a maximal entangled one. Our schemes require two auxiliary particles and perform single-qubit measurements on them. Thus our schemes are simple and economic. 相似文献
10.
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
11.
12.
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
13.
We propose two schemes for quantum dense coding without Bell states measurement. One is deterministic, the other is probabilistic. In the deterministic scheme, the initial entangled state will be not destructed. In the probabilistic scheme, the initial unknown nonmaximal entangled state will be transformed into a maximalentangled one. Our schemes require two auxiliary particles and perform single-qubit measurements on them. Thus our schemes are simple and economic. 相似文献
14.
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
15.
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
16.
ZHOU Jian DONG Ping CAO Zhuo-Liang 《理论物理通讯》2007,48(5):847-850
We present a scheme for teleportation of multi-ionic GHZ states and arbitrary bipartite ionic state only by single-qubit measurements via linear optical elements. In our scheme, we avoid the difficulty of joint measurement and synchronizing the arrival time of the two scattered photons, which are faced by previous schemes. So our scheme can be realized easily within current experimental technology. 相似文献
17.
Approximate and Conditional Teleportation of an Unknown Atomic State Without Bell-State Measurement with Two-Photon Interaction 总被引:1,自引:0,他引:1
CHEN Chang-Yong 《理论物理通讯》2006,45(1):79-82
A scheme for approximately and conditionally teleporting an unknown atomic state via two-photon interaction in cavity QED is proposed. It is the
extension of the scheme of Ref. [11] [Phys. Rev. A 69 (2004) 064302],
which is based on Jaynes-Cummings model in QED and where only a time point of
system evolution and the corresponding fidelity implementing the teleportation
are given. In our scheme, the two-photon interaction Jaynes-Cummings model is used to realize the approximate and conditional teleportation. Our scheme does
not involve the Bell-state measurement and an additional atom, only requiring
two atoms and one single-mode cavity. The fidelity of the scheme is higher
than that of Ref. [11]. The scheme may be generalized to not only the
teleportation of the state of a cavity mode to another mode by means of a
single atom but also the teleportation of the state of a trapped ion. 相似文献
18.
Chang-Yong Chen 《International Journal of Theoretical Physics》2006,45(4):690-697
A scheme for approximately and conditionally teleporting an unknown atomic state via multi-photon interaction in cavity quantum electro dynamics (QED) is proposed. It is the extension of the scheme of Zheng (2004) [Physical Review A69, 064302], which is based on Jaynes–Cummings model in QED and where only a time point of system evolution and the corresponding Fidelity implementing the teleportation are given. In our scheme, the cavity field may be Fock state and the multi-photon interaction Jaynes–Cummings model is used to realize the approximate and conditional teleportation. Our scheme does not involve the Bell-state measurement and an additional atom, only requiring two atoms and one single-mode cavity. The fidelity of the scheme is higher than that of Zheng (2004) [Physical Review A69, 064302]. The scheme may be generalized to not only the teleportation of the state of a cavity mode to another mode by means of a single atom but also the teleportation of the state of a trapped ion.
PACS: 03.67.-Ta, 03.65.Ta, 42.50.Dv 相似文献
19.
20.
Chuan-Jia Shan Ji-Bing Liu Tang-Kun Liu Yan-Xia Huang Hong Li 《International Journal of Theoretical Physics》2009,48(5):1516-1522
In this paper, we propose a scheme for the controlled teleportation of an arbitrary two-atom entangled state |φ〉12=a|gg〉12+b|ge〉12+c|eg〉12+d|ee〉12 in driven cavity QED. An arbitrary two-atom entangled state can be teleported perfectly with the help of the cooperation
of the third side by constructing a three-atom GHZ entangled state as the controlled channel. This scheme does not involve
apparent (or direct) Bell-state measurement and is insensitive to the cavity decay and the thermal field. The probability
of the success in our scheme is 1.0. 相似文献