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Probabilistic Teleportation of an Unknown One-Particle State by a Three-Particle General W State

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Communications in Theoretical Physics 2007年第4期47卷 625-628页

作者： xiu xiao-Ming DONG Li GAO Ya-Jun Department of Physics Bohai University Jinzhou 121000 China

Two schemes for teleporting an unknown one-particle state are proposed when a general W state is utilized as quantum channel. In the first scheme, after the sender （Alice） makes a Bell-state measurement on her particles, the recipient （Bob） performs a Von Neumann measurement and introduces an auxiliary particle, and carries out a unitary transformation on his particle and the auxiliary particle, and performs a Von Neumann measurement on the auxiliary particle to confirm whether the teleportation succeeds or not. In the second scheme, the recipient （Bob） does not need to perform the first Von Neumann measurement or introduce the auxiliary particle, which is necessary in the first scheme. It is shown that the maxima/probabilities of successful teleportation of the two schemes are identical if the recipient （Bob） performs an appropriate unitary transformation and adopts a proper particle on which he recovers the quantum information of state to be teleported.

关键词： quantum information probabilistic teleportation entanglement general W state

Reference model of future ubiquitous convergent network and context-aware telecommunication service platform

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The Journal of China Universities of Posts and Telecommunications 2006年第3期13卷 50-56页

作者： QIAO xiu-quan LI xiao-feng LIANG Shou-qing State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

A reference model for future ubiquitous convergent network is analyzed. To provide user-centric, intelligent, personalized service, this article presents a context-aware telecommunication service platform （CaTSP） to adapt to dynamically changing context. This article focuses on the new design method of context-aware telecommunication service platform and its architecture. Through the use of model-driven architecture （MDA） and semantic web technologies, CaTSP can enable context reasoning and service personalization adaption. This article explores a new approach for service intelligence, personalization, and adaptability in the semantic web service computing era.

关键词： ubiquitous convergent network context-aware,telecommunication service platform ontology OWL OWL-S,model-driven architecture

Improvement on Quantum Secure Direct Communication with W State in Noisy Channel

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Communications in Theoretical Physics 2009年第2期51卷 232-234页

作者： DONG Li xiu xiao-Ming GAO Ya-Jun CHI Feng Department of Physics Bohai University Jinzhou 121000 China

An improvement （Y-protocol） [Commun. Theor. Phys. 49 （2008） 103] on the quantum secure direct communication with W state （C-protocol） [Chin. Phys. Lett. 23 （2006） 290] is proposed by Yuan et al. The quantum bit error rate induced by eavesdropper is 4.17% in C-protocol and 6.25% in Y-protocoL In this paper, another improvement on C-protocol is given. The quantum bit error rate of the eavesdropping will increase to 8.75%, which is 1.1 times larger than that in C-protocol and 0.4 times larger than that in Y-protocol.

关键词： quantum cryptography quantum secure direct communication W state

Quantum Dialogue Protocol Using a Class of Three-Photon W States

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Communications in Theoretical Physics 2009年第11期52卷 853-856页

作者： DONG Li xiu xiao-Ming GAO Ya-Jun CHI Feng Department of Physics Bohai University Jinzhou 121000 China

A theoretical protocol of quantum dialogue is proposed,which uses a class of three-photon W states asquantum *** two-step security check,four-bit secret message can be transmitted to each other by transmittingof singl... 详细信息

关键词： quantum communication quantum dialogue W state

A Theoretical Scheme for Multiparty Multi-particle State Sharing

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Communications in Theoretical Physics 2008年第5期49卷 1203-1206页

作者： xiu xiao-Ming DONG Li GAO Ya-Jun CHI Feng Department of Physics Bohai University Jinzhou 121000 China

A theoretical scheme for multiparty multi-particle state sharing is proposed. After she introduces auxiliary particles and Einstein-Podolsky-Rosen （EPIC） pairs, the sender （Alice） performs Hadamard （14） gate operations and Controlled-NOT （CNOT） gate operations on them. Subsequently, the sender leaves one particle sequence and distributes the rest particles to the other participants. And then, the sender makes Bell-state measurements on her particles and publishes the measurement outcomes via the classical channel to realize the quantum state sharing among the others. Only the simple operations are used to realize quantum state sharing. The sender may increase or decrease the number of the participants by changing the number of the auxiliary particles.

关键词： quantum information quantum secret sharing quantum state sharing EPR state

Controlled Quantum Teleportation of a One-Particle Unknown State via a Three-Particle Entangled State

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Communications in Theoretical Physics 2007年第2X期48卷 261-263页

作者： xiu xiao-Ming DONG Li GAO Ya-Jun CHI Feng Department of Physics Bohai University Jinzhou 121000 China

A kind of three-particle entangled state is applied as quantum channel of the controlled quantum teleporration of a one-particle unknown state. The one-particle unknown state is transmitted from the sender to the recipient under the control of the supervisor. After the sender makes Bell-state measurement and the supervisor performs von Neumann measurement, the recipient carries out unitary transformation on his own particle depending on classical information from the sender and the supervisor. The teleportation cannot be completed successfully by the recipient if the supervisor does not agree to cooperate. The roles of the recipient and the supervisor may be exchanged in this scheme. The scheme is flexible and feasible because the sequence of manipulation of the sender and the supervisor may be exchanged and only simple unitary transformation is included.

关键词： quantum information controlled quantum teleportation entanglement unitary transformation

Quantum Secure Direct Communication with Four-Particle Genuine Entangled State and Dense Coding

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Communications in Theoretical Physics 2009年第7期52卷 60-62页

作者： xiu xiao-Ming DONG Li GAO Ya-Jun CHI Feng Department of Physics Bohai University Jinzhou 121000 China

A quantum secure direct communication scheme using dense coding is *** first,the sender (Alice)prepares four-particle genuine entangled states and shares them with the receiver (Bob) by sending two particles in eachentangled state to ***,Alice encodes secret information by performing the unitary transformations on herparticles and transmits them to ***,Bob performs the joint measurements on his particles to decode the *** two-step security test guarantees the security of communication.

关键词： quantum communication quantum secure direct communication entanglement swapping four- particle genuine entangled state

Quantum Teleportation Schemes of an N-Particle State via Three-Particle General W States

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Communications in Theoretical Physics 2008年第4期49卷 905-908页

作者： xiu xiao-Ming DONG Li GAO Ya-Jun CHI Feng Department of Physics Bohai University Jinzhou 121000 China

Two schemes of teleporting an N-particle arbitrary and unknown state are proposed when N groups of three- particle general W states are utilized as quantum channels. In the first scheme, the quantum channels are shared by the sender and the recipient. After the sender＇s Bell-state measurements on his （her） particles, the recipient carries out unitary transformations on his （her） particles. And then, the recipient performs computational basis measurements to realize the teleportation. The recipient can recover the state on either of particle sequences with the equal maximal probability of successful teleportation if he （she） performs appropriate unitary transformations. In the second scheme, the quantum channels are shared by the sender, the recipient and the third ones. After the sender＇s Be11-state measurements and the third ones＇ computational basis measurements if they agree to cooperate, the recipient will introduce auxiliary particles and carry out appropriate unitary transformations. Finally, the recipient performs computational basis measurements to fulfill the teleportation. The second scheme can be realized if and only if the third ones agree to cooperate with the recipient.

关键词： quantum information probabilistic teleportation general W state

Quantum Secure Direct Communication Using W State

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Communications in Theoretical Physics 2008年第6期49卷 1495-1498页

作者： DONG Li xiu xiao-Ming GAO Ya-Jun CHI Feng Physics Department Bohai University Jinzhou 121000 China

A theoretical scheme of quantum secure direct communication using teleportation is proposed. In the scheme, the sender needs to prepare a class of three-particle W states to use as quantum channel. The two communicators may communicate after they test the security of the quantum channel. The security of the protocol is ensured by quantum entanglement and quantum no-cloning theorem. The receiver can obtain the secret message determinately if the quantum channel is secure.

关键词： quantum information quantum secret direct communication W state