检索结果-南通市图书馆

Entanglement concentration for an arbitrary hybrid less-entangled state and w state using quantum dots and a microcavity coupled system

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第11期21卷 85-93页

作者：曹聪王川张茹 School of Science Beijing University of Posts and Telecommunications

we propose a practical entanglement concentration protocol （ECP） for a hybrid entangled state using quantum dots and a microcavity coupled system. A hybrid less-entangled state can he concentrated to a most-entangled state with a certain probability using only one ancillary single photon. Moreover, using this protocol, we can also concentrate an arbitrary three-particle less-entangled w state using two ancillary photons and classical communication. The proposed protocols provide us with a useful method to concentrate less-entangled states, which can he implemented with current technology.

关键词： entanglement concentration quantum dot microcavity w state

Fast generation of w state via superadiabatic-based shortcut in circuit quantum electrodynamics

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第3期30卷 61-67页

作者：王雪梅张安琪许鹏赵生妹 Institute of Signal Processing and Transmission Nanjing University of Posts and TelecommunicationsNanjing 210003China

we propose a scheme to fast prepare the three-qubit w state via superadiabatic-based shortcuts in a circuit quantumelectrodynamics (circuit QED) system. we derive the effective Hamiltonian to suppress the unwanted transitions betweendifferent eigenstates by counterdiabatic driving, and obtain the w state with high-fidelity based on the superadiabaticpassage. The numerical simulation results demonstrate that the proposed scheme can accelerate the evolution, and is moreefficient than that with the adiabatic passage. In addition, the proposed scheme is robust to the decoherence caused by theresonator decay and qubit relaxation, and does not need additional parameters, which could be feasible in experiment.

关键词： w state superadiabatic-based shortcut circuit quantum electrodynamics

An applicable and resource-economical scheme for the teleportation of w state via spin-path entangled quantum channel

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2008年第10期17卷 3729-3733页

作者：康国栋方卯发 College of Physics and Information Science Hunan Normal University

In this paper, we accomplish the teleportation of an unknown three-particle maximally entangled w state by using a spin-path entangled quantum channel which may be realized experimentally based on the advanced theory and technique in Bose-Einstein condensate （BEC） of molecule, micro-fabricated wave guide and simple quantum logic gate. Similarly, we can make an arbitrary n-particle entangled Greenberger Horne-Zeilinger （GHZ） state （n ≥ 4） teleported through this kind of quantum channel. It may have important applications due to its resource-economic and practical features.

关键词： teleportation spin-path entanglement w state fidelity

Deterministic and exact entanglement teleportation via the w state

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第1期19卷 41-45页

作者：陈秀波温巧燕孙中旭上官丽英杨义先 state Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Key Laboratory of Network and Information Attack and Defence Technology of Ministry of Education Beijing University of Posts and Telecommunications National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications water Supply Company of Daqing Petroleum Administration

Utilizing a three-particle w state, we come up with a protocol for the teleportation of an unknown two-particle entangled state. It is shown that the teleportation can be deterministically and exactly realized. Moreover, two-particle entanglement teleportation is generalized to a system consisting of many particles via a three-particle w state and a multi-particle w state, respectively. All unitary transformations performed by the receiver are given in a concise formula.

关键词： quantum teleportation w state unitary transformations

Generation of four-photon w state via 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9期17卷 3217-3219页

作者：钟志荣 Department of Physics Fuzhou University

This paper proposes an alternative scheme for generating four-photon w state via cavity QED. The scheme bases on the resonant interaction of a A-type three level atom with two bimodal cavities. The detection of atom collapses the cavity to the desired state. Comparing with previous schemes, the advantage of this scheme is that the interaction time can be greatly shortened since it uses the resonant interaction between atom and cavities. Moreover, the proposed scheme is more experimentally feasible than the previous ones.

关键词： w state resonant interaction

Perfect quantum teleportation and dense coding protocols via the 2N-qubit w state

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2011年第12期20卷 83-87页

作者：王美玉闫凤利 College of Physics Science and Information Engineering Hebei Normal University Hebei Advanced Thin Films Laboratory

In this paper, we investigate perfect quantum teleportation and dense coding by using an 2N-qubit w state channel. In the quantum teleportation scheme, an unknown N-qubit entangled state can be perfectly teleported. One ebit of entanglement and two bits of classical communication are consumed in the teleportation process, just like when using the Bell state channel. while N ＋ 1 bits of classical information can be transmitted by only sending N particles in the dense coding protocol.

关键词： quantum teleportation quantum dense coding w state

Distillation of bi-partite entanglement from w state with 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7期17卷 2514-2516页

作者：邓黎陈爱喜陈德海黄克林 Department of Applied Physics East China Jiaotong University

Following the theoretical protocol described by Fortescue and Lo [Fortescue B and Lo H K 2007 Phys. Rev. Lett. 98 2605011, we present a scheme in which one can distill maximally entangled bi-partite states from a tri-partite w state with cavity QED. Our scheme enables the concrete physical system to realize its protocol. In our scheme, the rate distillation also asymptotically approaches one. Based on the present cavity QED techniques, we discuss the experimental feasibility.

关键词： entanglelnent distillation w state cavity QED

Multi-hop teleportation based on w state and EPR pairs

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第5期25卷 53-57页

作者：占海涛余旭涛熊佩颖张在琛 state Key Laboratory of Millimeter waves Southeast University National Mobile Communications Research Laboratory Southeast University

Multi-hop teleportation has significant value due to long-distance delivery of quantum information. Many studies about multi-hop teleportation are based on Bell pairs, partially entangled pairs or w state. The possibility of multi-hop teleportation constituted by partially entangled pairs relates to the number of nodes. The possibility of multi-hop teleportation constituted by double w states is （4/9）~n after n-hop teleportation. In this paper, a multi-hop teleportation scheme based on w state and EPR pairs is presented and proved. The successful possibility of quantum information transmitted hop by hop through intermediate nodes is deduced. The possibility of successful transmission is （2/3）~n after n-hop teleportation.

关键词： multi-hop teleportation w state Bell pairs

Separability of evolving w state in a noise environment

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2021年第4期73卷 63-68页

作者：门前同蒋丽珍陈小余 College of Information and Electronic Engineering Zhejiang Gongshang UniversityHangzhou 310018ZhejiangChina

Entanglement is an important resource for quantum information *** provide a new entanglement witness to detect the entanglement of an evolving w *** results show that the new entanglement witness matches the evolving w state better than other witnesses or *** new witness significantly improves the performance of entanglement detection for some three-qubit states.

关键词： entanglement witness separable criterion PPT criterion w state