检索结果-南通市图书馆

Scheme for implementing quantum dense coding with w-class state in cavity QED

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2008年第5期17卷 1597-1600页

作者：何娟叶柳倪致祥 School of Physics & Material Science Anhui University Department of Physics Fuyang Normal College

An experimentally feasible protocol for realizing dense coding by using a class of w-state in cavity quantum electrodynamics （QED） is proposed in this paper. The prominent advantage of our scheme is that the successful probability of the dense coding with a w-class state can reach 1. In addition, the scheme can be implemented by the present cavity QED techniques.

关键词： quantum dense coding w-class state cavity quantum electrodynamics (QED)

Deterministic Quantum Secure Direct Communication and Authentication Protocol Based on w-class state

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2018年第2期27卷 276-280页

作者： LI Leilei ZHANG Yu wEN Shuang LI Na YANG Jiayu LI Jian School of Computer Science Beijing University of Posts and Telecommunications School of Electrical and Information Engineering Beijing University of Civil Engineering and Architecture

A Quantum secure direct communication(QSDC) and authentication protocol based on the w-class state is presented to enhance the efficiency of eavesdropping detection. In this protocol, the w-class state is used to transmission the checking sequence and detect eavesdroppers. In the security analysis, the method of entropy theory is introduced, and two detection strategies are compared quantitatively by using the constraint between the information that eavesdroppers can obtain and a normalized difference parameter is introduced. To obtain the same amount of information, the eavesdropper must face a higher detection probability in the proposed protocol than in the comparison. The security of the proposed protocol is also discussed. The analysis results indicate that the proposed protocol is more secure, but it must send more particles.

关键词： Eavesdropping detection Quantum secure direct communication(QSDC) w-class state Security analysis

Deterministic quantum teleportation and information splitting via a peculiar w-class state

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第2期19卷 62-66页

作者：梅锋於亚飞张智明 Laboratory of Photonic Information Technology School for Information and Optoelectronic Science and EngineeringSouth China Normal University

In the paper （Phys. Rev. 2006 A 4 062320） Agrawal et al. have introduced a kind of w-class state which can be used for the quantum teleportation of single-particle state via a three-particle von Neumann measurement, and they thought that the state could not be used to teleport an unknown state by making two-particle and one-particle measurements. Here we reconsider the features of the w-class state and the quantum teleportation process via the w-class state. we show that, by introducing a unitary operation, the quantum teleportation can be achieved deterministically by making two-particle and one-particle measurements. In addition, our protocol is extended to the process of teleporting two-particle state and splitting information.

关键词： w-class state quantum teleportation quantum information splitting

Scheme for Implementing Perfect Quantum Teleportation with Non-maximally Entangled w-class state in Cavity QED

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第8期50卷 375-378页

作者： PENG Zhao-Hui JIA Chun-Xia LI Jun-Gang School of Physics Hunan University of Science and Technology Xiangtan 411201 China Department of Physics Beijing Institute of Technology Beijing 100081 China

we propose an experimentally feasible teleportation scheme with three-atom w-class state,which was first proposed by Agrawal and Pati [*** and ***,***.A 74 (2006) 062320 ],in cavity *** this scheme atoms interact simultaneously with a nonresonant cavity and there is no energy exchange between the atoms and the *** it is insensitive to the cavity decay,which is of importance in view of experiment.

关键词： teleportation w-class state cavity QED

Distillation of GHZ state from Multiple Copies of Arbitrary w-class state

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第6期49卷 1502-1504页

作者： wU Chun-wang CHEN Ping-Xing LI Cheng-Zu Department of Applied Physics National University of Defense Technology Changsha 410073 China

w. Dur et al. have shown that it is impossible to obtain a GHZ state from one copy of arbitrary w-class state via local operations and classical communication （LOCC） [w. Dur, G. Vidal, and J.I. Cirac, Phys. Rev. A 62 （2000） 062314]. In our paper, the more general case is carefully investigated. we first show that, with a supply of two copies of arbitrary w-class state, we can always construct an explicit procedure to distill a GHZ state with a nonzero probability. Then based on this result, a simple procedure for distilling GHZ state from n copies of arbitrary w-class state is presented. Finally, we briefly discuss the applications.

关键词： distillation GHZ state w-class state

Quantum correlation of a three-particle-class state under quantum decoherence

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2013年第10期22卷 119-124页

作者：许鹏王栋叶柳 School of Physics and Material Science Anhui University

we investigate the quantum characteristics of a three-particle w-class state and reveal the relationship between quan- tum discord and quantum entanglement under decoherence. we can also identify the state for which discord takes a maximal value for a given decoherence factor, and present a strong bound on quantum entanglement-quantum discord. In contrast, a striking result will be obtained that the quantum discord is not always stronger than the entanglement of formation in the case of decoherence. Furthermore, we also theoretically study the variation trend of the monogamy of quantum correlations for the three-particle w-class state under the phase flip channel, and find that the three-particle w-class state could transform from polygamous into monogamous, owing to the decoherence.

关键词： quantum correlations quantum entanglement quantum discord w-class state