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Versatile and controlled quantum teleportation network
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作者 周瑶瑶 梅鹏娴 +4 位作者 刘艳红 吴量 李雁翔 闫智辉 贾晓军 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第3期415-423,共9页
A quantum teleportation network involving multiple users is essential for future quantum internet.So far,controlled quantum teleportation has been demonstrated in a three-user network.However,versatile and controlled ... A quantum teleportation network involving multiple users is essential for future quantum internet.So far,controlled quantum teleportation has been demonstrated in a three-user network.However,versatile and controlled quantum teleportation network involving more users is in demand,which satisfies different combinations of users for practical requirements.Here we propose a highly versatile and controlled teleportation network that can switch among various combinations of different users.We use a single continuous-variable six-partite Greenberger-Horne-Zeilinger(GHZ)state to realize such a task by choosing the different measurement and feedback operations.The controlled teleportation network,which includes one sub-network,two sub-networks and three sub-networks,can be realized for different application of user combinations.Furthermore,the coherent feedback control(CFC)can manipulate and improve the teleportation performance.Our approach is flexible and scalable,and would provide a versatile platform for demonstrations of complex quantum communication and quantum computing protocols. 展开更多
关键词 quantum teleportation coherent feedback control VERSATILE controlled transformation
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Reference-frame-independent quantum key distribution with two-way classical communication
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作者 Chun Zhou Hai-Tao Wang +9 位作者 Yi-Fei Lu Xiao-Lei Jiang Yan-Mei Zhao Yu Zhou Yang Wang Jia-Ji Li Yan-Yang Zhou Xiang Wang Hong-Wei Li Wan-Su Bao 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第10期146-152,共7页
The data post-processing scheme based on two-way classical communication(TWCC)can improve the tolerable bit error rate and extend the maximal transmission distance when used in a quantum key distribution(QKD)system.In... The data post-processing scheme based on two-way classical communication(TWCC)can improve the tolerable bit error rate and extend the maximal transmission distance when used in a quantum key distribution(QKD)system.In this study,we apply the TWCC method to improve the performance of reference-frame-independent quantum key distribution(RFI-QKD),and analyze the influence of the TWCC method on the performance of decoy-state RFI-QKD in both asymptotic and non-asymptotic cases.Our numerical simulation results show that the TWCC method is able to extend the maximal transmission distance from 175 km to 198 km and improve the tolerable bit error rate from 10.48%to 16.75%.At the same time,the performance of RFI-QKD in terms of the secret key rate and maximum transmission distance are still greatly improved when statistical fluctuations are considered.We conclude that RFI-QKD with the TWCC method is of practical interest. 展开更多
关键词 quantum key distribution reference-frame-independent two-way classical communication
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Quantum state protection from finite-temperature thermal noise with application to controlled quantum teleportation
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作者 王驰 Sajede Harraz +1 位作者 张骄阳 丛爽 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第5期261-271,共11页
We propose a quantum state protection scheme via quantum feedforward control combined with environment-assisted measurement to protect arbitrary unknown initial states from the finite-temperature thermal noise(FTTN).T... We propose a quantum state protection scheme via quantum feedforward control combined with environment-assisted measurement to protect arbitrary unknown initial states from the finite-temperature thermal noise(FTTN).The main strategy is to transfer the quantum system to a noise-robust state by weak measurement and feedforward control before the noise channel.Then we apply the environment-assisted measurement on the noise channel to select our desired damped states that are invertible to the initial state.After the noise channel,the reversal operations are applied to restore the initial state.We consider the protection of a single-qubit system,derive the analytical expressions of the success probability and the fidelity,and analyze the influence of key parameters on the performance of the proposed scheme.Unlike previous studies,there is no trade-off between the fidelity and the success probability in the proposed scheme;hence one could maximize them separately.Simulation results show that the proposed scheme can greatly improve the fidelity of the quantum state with a certain success probability.Moreover,the proposed scheme is successfully applied to improving the fidelity of controlled quantum teleportation through two independent FTTN channels from the perspective of protecting the shared entanglement. 展开更多
关键词 quantum feedforward control environment-assisted measurement weak measurement quantum teleportation
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Non-Gaussian approach:Withstanding loss and noise of multi-scattering underwater channel for continuous-variable quantum teleportation
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作者 吴昊 张航 +4 位作者 朱益武 罗高峰 左峙岳 阮新朝 郭迎 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第10期262-272,共11页
Underwater quantum communication plays a crucial role in ensuring secure data transmission and extensible quantum networks in underwater environments.However,the implementation of such applications encounters challeng... Underwater quantum communication plays a crucial role in ensuring secure data transmission and extensible quantum networks in underwater environments.However,the implementation of such applications encounters challenges due to the light attenuation caused by the complicated natural seawater.This paper focuses on employing a model based on seawater chlorophyll-a concentration to characterize the absorption and scattering of light through quantum channels.We propose a multi-scattering random channel model,which demonstrates characteristics of the excess noise in different propagation directions of communication links.Furthermore,we consider the fidelity of a continuous-variable quantum teleportation through seawater channel.To enhance transmission performance,non-Gaussian operations have been conducted.Numerical simulations show that incorporating non-Gaussian operations enables the protocol to achieve higher fidelity transmission or lower fidelity fading rates over longer transmission distances. 展开更多
关键词 continuous-variable quantum teleportation multi-scattering underwater channel non-Gaussian operations
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Improving the teleportation of quantum Fisher information under non-Markovian environment
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作者 李艳玲 曾艺博 +1 位作者 姚林 肖兴 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第1期172-177,共6页
Quantum teleportation is designed to send an unknown quantum state between two parties.In the perspective of remote quantum metrology,one may be interested in teleporting the information that is encoded by physical pa... Quantum teleportation is designed to send an unknown quantum state between two parties.In the perspective of remote quantum metrology,one may be interested in teleporting the information that is encoded by physical parameters synthesized by quantum Fisher information(QFI).However,the teleported QFI is often destroyed by the unavoidable interaction between the system and the environment.Here,we propose two schemes to improve the teleportation of QFI in the non-Markovian environment.One is to control the quantum system through the operations of weak measurement(WM)and corresponding quantum measurement reversal(QMR).The other is to modify the quantum system based on the monitoring result of the environment(i.e.,environment-assisted measurement,EAM).It is found that,in the non-Markovian environment,these two schemes can improve the teleportation of QFI.By selecting the appropriate strengths of WM and QMR,the environment noise can be completely eliminated and the initial QFI is perfectly teleported.A comprehensive comparison shows that the second scheme not only has a higher probability of success than the first one,but also has a significant improvement of the teleported QFI. 展开更多
关键词 weak measurement environment-assisted measurement teleportation of quantum Fisher information
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Several teleportation schemes of an arbitrary unknown multi-particle state via different quantum channels 被引量:21
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作者 彭家寅 莫智文 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第5期160-167,共8页
We first provide four new schemes for two-party quantum teleportation of an arbitrary unknown multi-particle state by using three-, four-, and five-particle states as the quantum channel, respectively. The successful ... We first provide four new schemes for two-party quantum teleportation of an arbitrary unknown multi-particle state by using three-, four-, and five-particle states as the quantum channel, respectively. The successful probability and fidelity of the four schemes reach 1. In the first two schemes, the receiver can only apply one of the unitary transformations to reconstruct the original state, making it easier for these two schemes to be directly realized. In the third and fourth schemes, the sender can preform Bell-state measurements instead of multipartite entanglement measurements of the existing similar schemes, which makes real experiments more suitable. It is found that the last three schemes may become tripartite controlled teleportation schemes of teleporting an arbitrary multi-particle state after a simple modification. Finally, we present a new scheme for three-party sharing an arbitrary unknown multi-particle state. In this scheme, the sender first shares three three-particle GHZ states with two agents. After setting up the secure quantum channel, an arbitrary unknown multi-particle state can be perfectly teleported if the sender performs three Bell-state measurements, and either of two receivers operates an appropriate unitary transformation to obtain the original state with the help of other receiver's three single-particle measurements. The successful probability and fidelity of this scheme also reach 1. It is demonstrated that this scheme can be generalized easily to the case of sharing an arbitrary unknown multi-particle state among several agents. 展开更多
关键词 quantum information quantum teleportation quantum state sharing multi-particle state
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Digital Multi-Signature Based on the Controlled Quantum Teleportation 被引量:8
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作者 WEN Xiaojun LIU Yun ZHANG Pengyun 《Wuhan University Journal of Natural Sciences》 CAS 2007年第1期29-32,共4页
In this paper, a scheme which can be used in multi-user quantum digital signature is proposed. The scheme of signature and verification is based on the characters of GHZ (Greenberger-Horne-Zeilinger) states and cont... In this paper, a scheme which can be used in multi-user quantum digital signature is proposed. The scheme of signature and verification is based on the characters of GHZ (Greenberger-Horne-Zeilinger) states and controlled quantum teleportation. Different from the digital signatures based on computational complexity, this scheme is unconditional secure, and compared to the former presented quantum signature scheme, it does not rely on an arbitrator to verify the signature and realize a message can be signed by multi-user together. 展开更多
关键词 quantum digital signature quantum teleportation MULTI-USER
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Bidirectional multi-qubit quantum teleportation in noisy channel aided with weak measurement 被引量:5
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作者 杨光 廉保旺 +1 位作者 聂敏 金娇 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第4期115-121,共7页
Recently,bidirectional quantum teleportation has attracted a great deal of research attention.However,existing bidirectional teleportation schemes are normally discussed on the basis of perfect quantum environments.In... Recently,bidirectional quantum teleportation has attracted a great deal of research attention.However,existing bidirectional teleportation schemes are normally discussed on the basis of perfect quantum environments.In this paper,we first put forward a bidirectional teleportation scheme to transport three-qubit Greenberger-Horne-Zeilinger(GHZ) states based on controled-not(CNOT) operation and single-qubit measurement.Then,we generalize it to the teleportation of multi-qubit GHZ states.Further,we discuss the influence of quantum noise on our scheme by the example of an amplitude damping channel,then we obtain the fidelity of the teleportation.Finally,we utilize the weak measurement and the corresponding reversing measurement to protect the quantum entanglement,which shows an effective enhancement of the teleportation fidelity. 展开更多
关键词 quantum teleportation quantum decoherence amplitude damping weak measurement
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Many-Agent Controlled Teleportation of Multi-qubit Quantum Information via Quantum Entanglement Swapping 被引量:14
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作者 ZHANG Zhan-Jun LIU Yi-Min MAN Zhong-Xiao 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第5X期847-850,共4页
We present a method to teleport multi-qubit quantum information in an easy way from a sender to a receiver via the control of many agents in a network. Only when all the agents collaborate with the quantum information... We present a method to teleport multi-qubit quantum information in an easy way from a sender to a receiver via the control of many agents in a network. Only when all the agents collaborate with the quantum information receiver can the unknown states in the sender's qubits be fully reconstructed in the receiver's qubits. In our method, agents's control parameters are obtained via quantum entanglement swapping. As the realization of the many-agent controlled teleportation is concerned, compared to the recent method [G.P. Yang, et al., Phys. Rev. A 70 (2004) 022329], our present method considerably reduces the preparation difficulty of initial states and the identification difficulty of entangled states, moreover, it does not need local Hadamard operations and it is more feasible in technology. 展开更多
关键词 quantum teleportation quantum information quantum entanglement swapping
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Entanglement diversion and quantum teleportation of entangled coherent states 被引量:5
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作者 蔡新华 郭杰荣 +1 位作者 聂建军 贾金平 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第3期488-491,共4页
The proposals on entanglement diversion and quantum teleportation of entangled coherent states are presented. In these proposals, the entanglement between two coherent states, |α〉 and |-α〉, with the same amplitu... The proposals on entanglement diversion and quantum teleportation of entangled coherent states are presented. In these proposals, the entanglement between two coherent states, |α〉 and |-α〉, with the same amplitude but a phase difference of π is utilized as a quantum channel. The processes of the entanglement diversion and the teleportation are achieved by using the 50/50 symmctric beam splitters, the phase shifters and the photodetectors with the help of classical information. 展开更多
关键词 entangled coherent state entanglement diversion quantum teleportation detection of photon
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Quantum teleportation by entanglement swapping with trapped ions 被引量:4
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作者 郑小娟 方卯发 +1 位作者 蔡建武 廖湘萍 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第3期492-495,共4页
An effective teleportation scheme for an unknown ionic internal state via trapped ions is proposed without joint Bell-state measurement (BSM). In the constructed quantum channel process, we make use of entanglement ... An effective teleportation scheme for an unknown ionic internal state via trapped ions is proposed without joint Bell-state measurement (BSM). In the constructed quantum channel process, we make use of entanglement swapping to avoid decrease in entanglement during the distributing of particles. Thus our scheme provides new prospects for quantum teleportatlon in a longer distance. The distinct advant.age of our scheme is insensitive to the heating of vibrational mode. Furthermore, our scheme has no any individual optical access, and the successful probability also can reach 1. 展开更多
关键词 ENTANGLEMENT entanglement swapping quantum teleportation trapped ions
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Probabilistic and controlled teleportation of tripartite state in a general form and its quantum networks 被引量:4
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作者 袁洪春 齐开国 《Chinese Physics B》 SCIE EI CAS CSCD 2005年第9期1716-1723,共8页
We discuss a scheme for probabilistic and controlled teleportation of an unknown arbitrary three-particle state by constructing a peculiar non-maximally entangled state as a controlled quantum channel, which is telepo... We discuss a scheme for probabilistic and controlled teleportation of an unknown arbitrary three-particle state by constructing a peculiar non-maximally entangled state as a controlled quantum channel, which is teleported between two sides with the help of the auxiliary particle and the cooperation of the third side (Charlie) as a supervisor. In comparison with some existing schemes, on the receiver's side it is easy to have the sender's state through operating two uniform unitary transformations in turn. In addition, we also give an efficient quantum network for implementing the new scheme by means of some primitive operations. 展开更多
关键词 arbitrary tripartite state controlled teleportation quantum circuit
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Probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel and its application in quantum state sharing 被引量:3
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作者 周萍 李熙涵 +1 位作者 邓富国 周宏余 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第10期2867-2874,共8页
This paper presents a scheme for probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel. The sender Alice first teleports the coefficients of the unknown state t... This paper presents a scheme for probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel. The sender Alice first teleports the coefficients of the unknown state to the receiver Bob, and then Bob reconstructs the state with an auxiliary particle and some unitary operations if the teleportation succeeds. This scheme has the advantage of transmitting much less particles for teleporting an arbitrary GHZ-class state than others. Moreover, it discusses the application of this scheme in quantum state sharing. 展开更多
关键词 quantum teleportation arbitrary GHZ-class state pure entanglement quantum state sharing
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Multi-agent controlled teleportation of multi-qubit quantum information via two-step protocol 被引量:3
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作者 杨杰 《Chinese Physics B》 SCIE EI CAS CSCD 2005年第11期2149-2152,共4页
Utilizing both the general quantum teleportation and the two-step protocol, a new method is presented by which multi-qubit quantum information can be teleported in a much easier way from a sender Alice to a receiver B... Utilizing both the general quantum teleportation and the two-step protocol, a new method is presented by which multi-qubit quantum information can be teleported in a much easier way from a sender Alice to a receiver Bob via the control of many agents in a network than by Yang et al's method. In this method, only all the agents collaborate with Bob can the unknown states in Alice's qubits be fully reconstructed in Bob's qubits. Comparisons between the method and Yang et al's method are made. Results show that, in this method, the preparation difficulty of initial states and the identification difficulty of entangled states are considerably reduced, new method is more feasible in technique, and Hadamard operations are not needed at all. 展开更多
关键词 quantum teleportation two-step protocol quantum information
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A controlled quantum teleportation scheme of an N-particle unknown state via three-particle W1 states 被引量:2
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作者 修晓明 董莉 +1 位作者 高亚军 迟锋 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第8期2194-2199,共6页
In this paper a controlled quantum teleportation scheme of an N-particle unknown state is proposed when N groups of three-particle W1 states are utilized as quantum channels. The quantum information of N-particle unkn... In this paper a controlled quantum teleportation scheme of an N-particle unknown state is proposed when N groups of three-particle W1 states are utilized as quantum channels. The quantum information of N-particle unknown state is transmitted from the sender to the recipient under the control of all supervisors. It can be realized with a certain probability. After the sender makes Bell-state measurements and the supervisors perform the computational basis measurements, the recipient will introduce auxiliary particles and carry out unitary transformations depending on classical information from the sender and the supervisors. Finally, the computational basis measurement will be performed by the recipient to confirm whether the teleportation succeeds or not. The successful completion of the scheme relies on all supervisors' cooperation. In addition, the fidelity and security of the scheme are discussed. 展开更多
关键词 quantum information controlled quantum teleportation W1 state
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Probabilistic Teleportation of an Arbitrary Two-Particle State and Its Quantum Circuits 被引量:5
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作者 GUO Zhan-Ying FANG Jian-Xing +1 位作者 ZHU Shi-Qun QIAN Xue-Min 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第6期1013-1017,共5页
Two simple schemes for probabilistic teleportation of an arbitrary unknown two-particle state using a non-maximally entangled EPR pair and a non-maximally entangled GHZ state as quantum channels are proposed. After re... Two simple schemes for probabilistic teleportation of an arbitrary unknown two-particle state using a non-maximally entangled EPR pair and a non-maximally entangled GHZ state as quantum channels are proposed. After receiving Alice's Bell state measurement results, Bob performs a collective unitary transformation on his inherent particles without introducing the auxiliary qubit. The original state can be probabilistically teleported. Meanwhile, quantum circuits for realization of successful teleportation are also presented. 展开更多
关键词 probabilistic teleportation arbitrary two-particle state unitary transformation quantum circuit
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Controlled teleportation of high-dimension quantumstates with generalized Bell-state measurement 被引量:2
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作者 詹佑邦 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第9期2557-2562,共6页
In this paper a scheme for controlled teleportation of arbitrary high-dimensional unknown quantum states is proposed by using the generalized Bell-basis measurement and the generalized Hadamard transformation. As two ... In this paper a scheme for controlled teleportation of arbitrary high-dimensional unknown quantum states is proposed by using the generalized Bell-basis measurement and the generalized Hadamard transformation. As two special cases, two schemes of controlled teleportation of an unknown single-qutrit state and an unknown two-qutrit state are investigated in detail. In the first scheme, a maximally entangled three-qutrit state is used as the quantum channel, while in the second scheme, an entangled two-qutrit state and an entangled three-qutrit state are employed as the quantum channels. In these schemes, an unknown qutrit state can be teleported to either one of two receivers, but only one of them can reconstruct the qutrit state with the help of the other. Based on the case of qutrits, a scheme of controlled teleportation of an unknown qudit state is presented. 展开更多
关键词 controlled teleportation high-dimensional quantum state generalized Bell-basis measurement generalized Hadamard transformation
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Teleportations of Mixed States and Multipartite Quantum States 被引量:4
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作者 YU Chang-Shui WANG Ya-Hong SONG He-Shan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第6期1041-1044,共4页
In this paper, we propose a protocol to deterministically teleport an unknown mixed state of qubit by utilizing a maximally bipartite entangled state of qubits as quantum channel. Ira non-maximally entangled bipartite... In this paper, we propose a protocol to deterministically teleport an unknown mixed state of qubit by utilizing a maximally bipartite entangled state of qubits as quantum channel. Ira non-maximally entangled bipartite pure state is employed as quantum channel, the unknown mixed quantum state of qubit can be teleported with 1 -√ 1- C^2 probability, where C is the concurrence of the quantum channel. The protocol can also be generalized to teleport a mixed state of qudit or a multipartite mixed state. More important purpose is that, on the basis of the protocol, the teleportation of an arbitrary multipartite (pure or mixed) quantum state can be decomposed into the teleportation of each subsystem by employing separate entangled states as quantum channels. In the case of deterministic teleportation, Bob only needs to perform unitary transformations on his single particles in order to recover the initial teleported multipartite quantum state. 展开更多
关键词 teleportation mixed state multipartite quantum state
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Probabilistic Teleportation of Multi-particle d-Level Quantum State 被引量:4
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作者 CAOMin ZHUShi-Qun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第5期803-805,共3页
The general scheme for teleportation of a multi-particle d-level quantumstate is presented when m pairs of partially entangled particles are utilized as quantum channels.The probabilistic teleportation can be achieved... The general scheme for teleportation of a multi-particle d-level quantumstate is presented when m pairs of partially entangled particles are utilized as quantum channels.The probabilistic teleportation can be achieved with a successful probability of Π from N=0 to d-1of (C_0~N)~2/d~M, which is determined by the smallest coefficients of each entangled channels. 展开更多
关键词 MULTI-PARTICLE d-level quantum state probabilistic teleportation
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Controlled Quantum Teleportation of a One-Particle Unknown State via a Three-Particle Entangled State 被引量:3
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作者 XIU Xiao-Ming DONG Li GAO Ya-Jun CHI Feng 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第2X期261-263,共3页
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 reci... 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. 展开更多
关键词 quantum information controlled quantum teleportation ENTANGLEMENT unitary transformation
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