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1.
Qubits are realized as polarization state of photons or as superpositions of the spin states of electrons. In this paper we propose a scheme to probabilistically teleport an unknown arbitrary two-qubit state using a non-maximally entangled GHZ-like state and a non-maximally Bell state simultaneously as quantum channels. We also discuss the success probability of our scheme. We perform POVM in the protocol which is operationally advantageous. In our scheme we show that the non-maximal quantum resources perform better than maximal resources. 相似文献
2.
Qing Shao 《International Journal of Theoretical Physics》2013,52(8):2573-2577
In this article, a scheme for quantum teleportation of a two-qubit entangled state using four-qubit cluster state is discussed by use of cavity quantum electrodynamics (QED) involving the interaction of the atoms with the cavity. In this protocol, by using a one-dimensional maximally four-qubit cluster state as quantum channel, quantum information of an unknown state of two two-level particles is faithfully transmitted from a sender (Alice) to a remote receiver (Bob). According to the results measured by the Bob, as it is shown, the unknown two-particle entangled state can be teleported perfectly, and the successful possibilities and fidelities of the scheme can reach 1.0. 相似文献
3.
Xin-Wen Wang 《Optics Communications》2009,282(5):1052-1055
Recently, Yeo and Chua introduced a genuine four-qubit entangled state |χ〉 which can implement perfect teleportation of an arbitrary two-qubit state [Y. Yeo, W.K. Chua, Phys. Rev. Lett. 96 (2006) 060502]. It has been shown that the state |χ〉 is inequivalent to the well-known Greenberger-Horne-Zeilinger state, W state, and linear cluster state, in terms of stochastic local operations and classical communication [C.F. Wu, Y. Yeo, L.C. Kwek, C.H. Oh, Phys. Rev. A 75 (2007) 032332]. This “new” class of state has many interesting entanglement properties and possible applications in quantum-information processing and fundamental tests of quantum mechanics. Here, we propose a simple scheme to generate the state |χ〉 in cavity quantum electrodynamics. Our idea may be helpful for in-depth study on such a class of state and its practical applications. 相似文献
4.
Mohammad Sadegh Sadeghi Zadeh Monireh Houshmand Hossein Aghababa 《International Journal of Theoretical Physics》2017,56(7):2101-2112
In this paper, a new scheme of bidirectional quantum teleportation (BQT) making use of an eight-qubit entangled state as the quantum channel is presented. This scheme is the first protocol without controller by which the users can teleport an arbitrary two-qubit state to each other simultaneously. This protocol is based on the ControlledNOT operation, appropriate single-qubit unitary operations and single-qubit measurement in the Z-basis and X-basis. 相似文献
5.
Peng-Fei Duan Wei-Long Duan Qiong-Si Fu Min Tang Pei-Hua Chen 《International Journal of Theoretical Physics》2014,53(12):4402-4406
We propose a scheme to prepare a two-qubit remote entangled state based on four-qubit cluster state in cavity quantum electrodynamics which involves the interaction of the atoms with the cavity. Through using four-particle cluster state as a quantum channel, we shown that the probability and fidelity of the successful remote state preparation can approach unit. In addition, our protocol only need single qubit measurement instead of the conventional Bell-state measurement, then it is quite simple but also very robust to the cavity decay and the influence of the thermal field. 相似文献
6.
Xin-Wen Wang Deng-Yu Zhang Shi-Qing Tang Li-Jun Xie 《International Journal of Theoretical Physics》2012,51(6):1978-1988
Entanglement swapping for four-qubit cluster-class states is studied. It is shown that a four-qubit cluster state (maximally
entangled) can be obtained with a certain probability from two four-qubit cluster-class states by entanglement swapping. The
probability is related to the smallest superposition coefficient of the cluster-class states (when all the moduli of amplitudes
are equivalent, they are the usual cluster states and the probability hits to one). Two examples for the applications of the
entanglement swapping are also presented. One is quantum teleportation of an arbitrary two-qubit state via a quantum repeater,
in which the success probability can be improved by the entanglement swapping when the quantum channels are general cluster-class states (partially entangled). The other is quantum key distribution, in which a secret random sequence of bits
(a “key”) can be efficiently established between two distant parties by the entanglement swapping of two groups of cluster
states. 相似文献
7.
We present an explicit protocol for probabilistic teleport an arbitrary and unknown two-qubit entangled state via a one-dimensional
four-particle non-maximally entangled cluster state. By construction, our four-partite state is not reducible to a pair of
Bell states. We show that teleportation can be successfully realized with a certain probability. This protocol indicate that
the four-qubit state is a likely candidate for the genuine four-particle analogue to a Bell state. 相似文献
8.
9.
Quantum multicast schemes of different quantum states via non-maximally entangled channels with multiparty involvement
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《中国物理 B》2021,30(9):90302-090302
Due to the unavoidable interaction between the quantum channel and its ambient environment, it is difficult to generate and maintain the maximally entanglement. Thus, the research on multiparty information transmission via non-maximally entangled channels is of academic value and general application. Here, we utilize the non-maximally entangled channels to implement two multiparty remote state preparation schemes for transmitting different quantum information from one sender to two receivers synchronously. The first scheme is adopted to transmit two different four-qubit cluster-type entangled states to two receivers with a certain probability. In order to improve success probabilities of such multicast remote state preparation using non-maximally entangled channels, we put forward the second scheme, which deals with the situation that is a synchronous transfer of an arbitrary single-qubit state and an arbitrary two-qubit state from one sender to two receivers. In particular, its success probability can reach 100% in principle, and independent of the entanglement degree of the shared non-maximally entangled channel. Notably, in the second scheme, the auxiliary particle is not required. 相似文献
10.
11.
Li Yuan-hua Qiao Yi Sang Ming-huang Nie Yi-you 《International Journal of Theoretical Physics》2019,58(7):2228-2234
We propose a scheme of bidirectional controlled remote state preparation of an arbitrary two-qubit state, where a nine-qubit entangled state is used as the quantum channel. In our scheme, Alice and Bob can prepare simultaneously an arbitrary two-qubit state for each other’s place with the help of the controller Charlie. The total success probability for our scheme reaches 100%. PACS numbers 03.67.Hk, 03.65.Ud, 42.50.Dv.
相似文献12.
Ming-huang Sang 《International Journal of Theoretical Physics》2016,55(3):1333-1335
We propose a scheme for bidirectional quantum teleportation by using a five-qubit cluster state. In our scheme, Alice can transmit an arbitrary two-qubit entangled state to Bob and at the same time Bob can teleport an arbitrary single-qubit state to Alice. 相似文献
13.
Yuan-hua Li Li-ping Nie Xiao-lan Li Ming-huang Sang 《International Journal of Theoretical Physics》2016,55(6):3008-3016
We propose a scheme for asymmetric bidirectional controlled teleportation by using a six-qubit cluster state as quantum channel. In our scheme, Alice can transmit an arbitrary two-qubit entangled state to Bob and at the same time Bob can teleport an arbitrary single-qubit state to Alice under the control of the supervisor Charlie. 相似文献
14.
提出基于腔QED技术的多用户间的多原子W态和GHZ态量子信道的建立方案.在量子网络的空闲时段,各个用户和量子交换机共享EPR对.量子交换机通过原子和腔场的相互作用将两个EPR对制备成W态,再与另一个EPR对进行纠缠交换,经过直接测量后为用户建立三原子W态量子信道;同时讨论了四用户间的W态量子信道的建立方案.量子交换机对三个EPR对进行纠缠交换,将三个原子同时与腔场作用,经过直接测量后为用户建立三原子GHZ态量子信道;并将此方法推广到N个用户间的GHZ态量子信道的建立.
关键词:
腔QED
量子信道
量子交换机
纠缠交换 相似文献
15.
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
16.
Recently, Huang and Zhao (Int. J. Theor. Phys. 56, 678, 2017) proposed a new scheme for controlled remote state preparation of an arbitrary two-qubit state by using two sets of three-qubit GHZ states as the quantum channel. In the scheme, Alice and Bob choose four different kinds of two-qubit projective measurement bases to measure their local qubits, respectively. We demonstrate that two sets of four-qubit GHZ states can be used to realize the deterministic controlled remote state preparation of an arbitrary two-qubit state by performing only two-qubit projective measurements. 相似文献
17.
Teleportation of a two-atom entangled state using a single EPR pair in cavity QED 总被引:1,自引:0,他引:1
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We propose a scheme for teleporting a two-atom entangled state in
cavity quantum electrodynamics (QED). In the scheme, we choose a
single Einstein--Podolsky--Rosen (EPR) pair as the quantum channel which
is shared by the sender and the receiver. By using the atom--cavity-field
interaction and introducing an additional atom, we can teleport
the two-atom entangled state successfully with a probability of 1.0.
Moreover, we show that the scheme is insensitive to cavity decay
and thermal field. 相似文献
18.
We propose a scheme for cloning an arbitrary unknown two-qubit state and its orthogonal complement state with the assistance from the state preparer. Our scheme includes two stages. The first stage requires a quantum teleportation process, in which an arbitrary unknown two-qubit state can be deterministically teleported from the sender to the receiver with χ-type entangled states as the quantum channel. In the second stage, with the assistance of the state preparer, either a perfect copy or an orthogonal complement state of an arbitrary unknown two-qubit state can be obtained with a certain probability. 相似文献
19.
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
20.
You-Bang Zhan Hao Fu Xiao-Wei Li Peng-Cheng Ma 《International Journal of Theoretical Physics》2013,52(8):2615-2622
We propose a scheme for remotely preparing a four-qubit cluster-type state with complex coefficients by using six EPR pairs as the quantum channel. To complete the remote state preparation scheme, a novel set of four-qubit mutually orthogonal basis vectors has been introduced. It is shown that, after the sender performs two different four-qubit projective measurements, the receiver can reconstruct the original state (to be prepared remotely) with unit successful probability. Moreover, the scheme is also generalized to the case that non-maximally two-qubit entangled states are taken as the quantum channel. 相似文献