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Quantum Generalized Measurement and Deterministic Generation of Maximum Entangled Pure State 被引量:1
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作者 ZHANG Ming DAI Hong-Yi +1 位作者 HU De-Wen XIE Hong-Wei 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第5X期833-837,共5页
We propose the concept of the quantum generalized projector measurement (QGPM) for finite-dimensional quantum systems by studying the quantum generalized measurement. This research reveals a distinguished property o... We propose the concept of the quantum generalized projector measurement (QGPM) for finite-dimensional quantum systems by studying the quantum generalized measurement. This research reveals a distinguished property of this quantum generalized measurement: no matter what the system state is prior to the measurement and what the result of the measurement occurs, the state of the system after the measurement can be collapsed into any specified pure state, i.e., the state of quantum system can be deterministically reduced to any specified pure state just by a single QGPM. Subsequently. QGPM can be used to deterministically generate the maximum entangled pure state for quantum systems. We give three concrete theoretic schemes of generating the maximum quantum entangled pure states for two 2-Jevel particles, three 2-level particles and two 3-Jevel particles, respectively. 展开更多
关键词 quantum generalized measurement maximum entanglement state
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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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The remote implementation of all possible generalized quantum measurements on a single atomic qubit in a quantum network
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作者 韩阳 吴春旺 +2 位作者 吴伟 陈平形 李承祖 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第8期3215-3220,共6页
To implement generalized quantum measurement (GQM) one has to extend the original Hilbert space. Generally speaking, the additional dimensions of the ancilla space increase as the number of the operators of the GQM ... To implement generalized quantum measurement (GQM) one has to extend the original Hilbert space. Generally speaking, the additional dimensions of the ancilla space increase as the number of the operators of the GQM n increases. This paper presents a scheme for deterministically implementing all possible n-operator CQMs on a single atomic qubit by using only one 2-dimensional ancillary atomic qubit repeatedly, which remarkably reduces the complexity of the realistic physical system. Here the qubit is encoded in the internal states of an atom trapped in an optical cavity and single-photon pulses are employed to provide the interaction between qubits. It shows that the scheme can be performed remotely, and thus it is suitable for implementing CQM in a quantum network. What is more, the number of the total ancilla dimensions in our scheme achieves the theoretic low bound. 展开更多
关键词 generalized quantum measurement single atomic qubit CAVITY-QED
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Generalized Quantum Two-Qutrit-State Splitting 被引量:2
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作者 YUAN Hao LIU Yi-Min ZHANG Zhan-Jun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第10期873-878,共6页
A three-party scheme for splitting an arbitrary unknown two-qutrit state is proposed,where two non-maximally-entangled three-qutrit states are taken as the quantum channel among three parties.With the sender'shelp... A three-party scheme for splitting an arbitrary unknown two-qutrit state is proposed,where two non-maximally-entangled three-qutrit states are taken as the quantum channel among three parties.With the sender'shelp,if and only if both receivers collaborate together,they can securely share the quantum state in a probabilisticway by introducing an ancilla qutrit and performing appropriate unitary operations.The relation between the successprobability and coefficients characterizing the quantum channel is revealed.The security of the present scheme is analyzedand confirmed.Moreover,the generalization of the three-party scheme to more-party case is also sketched. 展开更多
关键词 generalized quantum state splitting partially entangled state generalized Bell-state measurement single-qutrit projective measurement
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A criterion for quantum teleportation of an arbitrary N-particle state via a 2N-particle quantum channel 被引量:3
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作者 刘大明 王艳伟 +1 位作者 江秀梅 郑亦庄 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第2期53-61,共9页
A criterion for he tquantum teleportation of an arbitrary N-particle state via a 2N-particle quantum channel is presented by introducing a term of the judgment operator''. Using the criterion, not only the qualitati... A criterion for he tquantum teleportation of an arbitrary N-particle state via a 2N-particle quantum channel is presented by introducing a term of the judgment operator''. Using the criterion, not only the qualitative judgment of the possibility of successful teleportation can be made but also the quantitative calculation of the probability of successful teleportation can be explicitly given. In addition, a new genuine four-qubit entangled state is proposed, which could not belong to the category of previously known states under stochastic local operations and classical communication. 展开更多
关键词 teleportation criterion judgment operator generalized measurement base
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Quantum circuits for realizing deterministic and exact teleportation via two partially entangled pairs of particles
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作者 李文东 张建立 顾永建 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第3期482-487,共6页
Deterministic and exact teleportation can be achieved via two partially entangled pairs of particles [Gu Y J 2006 Opt. Comm. 259 385]. The key point of the protocol is a generalized measurement described by a positive... Deterministic and exact teleportation can be achieved via two partially entangled pairs of particles [Gu Y J 2006 Opt. Comm. 259 385]. The key point of the protocol is a generalized measurement described by a positive operator- valued measure, which can be realized by performing a unitary operation in the extended space and a conventional Von Neumann orthogonal measurement. By decomposing the evolution process from the initial state to the final state, we construct the quantum circuits for realizing the unitary operation with quantum Toffoli gates, and thus provide a physical means to realize the teleportation. Our method for constructing quantum circuits differs from the usual methods based on decomposition of unitary matrices, and is convenient for a large class of quantum processes involving generalized measurements. 展开更多
关键词 quantum circuit TELEPORTATION partially entangled state generalized measurement
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Analysis on the Problems in Start-up and Debugging of Two 600 MW Generating Units in Yangzhou No.2 Thermal Power Plant
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作者 蒯狄正 《Electricity》 2001年第2期11-15,共5页
The problems including excessive flow of attemperating water for boiler, failure of butterfly valve at the outlet of circulating water pump, burnt-out of thyristor for excitation regulator, load variation rate of CCS ... The problems including excessive flow of attemperating water for boiler, failure of butterfly valve at the outlet of circulating water pump, burnt-out of thyristor for excitation regulator, load variation rate of CCS not complying with the contract target, etc. occurred during start-up and debugging of two 600 MW generating units in Yangzhou No.2 Thermal Power Plant. Through analysis on these problems. the remedial measures were put forward, to which can be referred for similar units. 展开更多
关键词 start-up and debugging problems analysis remedial measures 600 MW generating unit
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Controlled Probabilistic Teleportation of an Unknown Multi-Particle High-Dimensional Entangled State 被引量:1
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作者 SHI Jin ZHAN You-Bang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第6期1027-1032,共6页
We propose a protocol for controlled probabilistic teleportation of an unknown tripartite qutrit entangled state with two partial tripartite qutrit entangled states as the quantum channel. It is found that teleportati... We propose a protocol for controlled probabilistic teleportation of an unknown tripartite qutrit entangled state with two partial tripartite qutrit entangled states as the quantum channel. It is found that teleportation associated with the generalized qutrit Bell-basis measurement, the generalized qutrit π-state measurement and the generalized Hadamard operator in three-dimensional Hilbert space. We generalize the protocol for controlled probabilistic teleportation of an unknown k-particle qudit entangled state with a multi-particle qudit entangled state and a tripartite qudit entangled state as the quantum channel. We also calculate the classical communication cost required in both cases. 展开更多
关键词 probabilistic teleportation generalized Bell-basis measurement Hadamard operator unitary transformation classical communication cost
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Scheme for Implementing Assisted Cloning of an Unknown d-Dimension Equatorial Quantum State by Remote State Preparation
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作者 MA Peng-Cheng ZHAN You-Bang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第1期57-59,共3页
In this paper, we propose a protocol that can produce perfect copy of an unknown d-dimensional equatorial quantum state with assistance from a state preparer. In this protocol, the maximally and non-maximally entangle... In this paper, we propose a protocol that can produce perfect copy of an unknown d-dimensional equatorial quantum state with assistance from a state preparer. In this protocol, the maximally and non-maximally entangled bipartite d-dimensional of states are used as the quantum channels, respectively. The first stage of the protocol requires usual teleportation. In the second stage of the protocol, with the assistance of the preparer, the perfect copy of an original unknown state can be produced. 展开更多
关键词 Iquantum cloning single-qudit quantum state quantum teleportation generalized projective measurement
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GENERALIZED INTUITIONISTIC FUZZY HYBRID CHOQUET AVERAGING OPERATORS 被引量:2
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作者 Fanyong MENG Qiang ZHANG 《Journal of Systems Science and Systems Engineering》 SCIE EI CSCD 2013年第1期112-122,共11页
In this study a new hybrid aggregation operator named as the generalized intuitionistic fuzzy hybrid Choquet averaging(GIFHCA) operator is defined.Meantime,some desirable properties are studied, and several importan... In this study a new hybrid aggregation operator named as the generalized intuitionistic fuzzy hybrid Choquet averaging(GIFHCA) operator is defined.Meantime,some desirable properties are studied, and several important cases are examined.Furthermore,we define the generalized Shapley GIFHCA (GS-GIFHCA) operator,which does not only overall consider the importance of elements and their ordered positions,but also globally reflect the correlations among them and their ordered positions.In order to simplify the complexity of solving a fuzzy measure,we further define the generalizedλ-Shapley GIFHCA(GλS-GIFHCA) operator. 展开更多
关键词 Multi-attribute group decision making intuitionistic fuzzy set Choquet integral generalized Shapley function fuzzy measure
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Some Source Coding Theorems and 1:1 Coding Based on Generalized Inaccuracy Measure of Order α and Typeβ
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作者 Satish Kumar Arun Choudhary Arvind Kumar 《Communications in Mathematics and Statistics》 SCIE 2014年第2期125-138,共14页
In this paper,we have established some noiseless coding theorems for a generalized parametric‘useful’inaccuracy measure of orderαand typeβand generalized mean codeword length.Further,lower bounds on exponentiated ... In this paper,we have established some noiseless coding theorems for a generalized parametric‘useful’inaccuracy measure of orderαand typeβand generalized mean codeword length.Further,lower bounds on exponentiated useful code length for the best 1:1 code have been obtained in terms of the useful inaccuracy of orderαand typeβand the generalized average useful codeword length. 展开更多
关键词 generalized inaccuracy measures Mean codeword length Holder’s inequality
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Teleportation of an unknown two-particle entangled state via an asymmetric three-particle entanglement state 被引量:1
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作者 CHEN Xiu-bo DU Jian-zhong +1 位作者 WEN Qiao-yan ZHU Fu-chen 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2008年第1期102-105,共4页
In this article, a protocol for the teleportation of an unknown two-panicle entanglement is proposed. The feature of the present protocol is that we utilize an asymmetric threeparticle entangled state as the quantum c... In this article, a protocol for the teleportation of an unknown two-panicle entanglement is proposed. The feature of the present protocol is that we utilize an asymmetric threeparticle entangled state as the quantum channel. The optimal discrimination between two nonorthogonal quantum states is adopted. It is shown that an unknown two-particle entangled state can be probabilistically teleported from the sender to the remote receiver on condition that the co-sender successfully collaborates. The fidelity in this protocol is one. In addition, the probability of the successful teleportation is calculated and all kinds of transformations performed by the sender and the receiver are provided in detail. 展开更多
关键词 TELEPORTATION two-particle entangled state asym metric three-particle entangled state generalized measurement
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Criterion and flexibility of operation difficulty for perfect teleportation of arbitrary n-qutrit state with (n:n)-qutrit pure state 被引量:1
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作者 ZHANG ZiYun LIU YiMin +1 位作者 ZHANG Wen ZHANG ZhanJun 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第8期1476-1480,共5页
Under the preconditions that a (n:n)-qutrit pure state is taken as the quantum channel to teleport an arbitrary n-qutrit state and the sender is able to perform generalized-Bell-state measurements and publish the resu... Under the preconditions that a (n:n)-qutrit pure state is taken as the quantum channel to teleport an arbitrary n-qutrit state and the sender is able to perform generalized-Bell-state measurements and publish the results, the necessary transformation operation in the receiver's site is worked out in terms of the technique of swapping states. A criterion on whether such quantum channel can be utilized for perfect teleportation is derived by virtue of the unitarity of the resultant transformation operator. Moreover, the flexibility between the measurement difficulty and the reconstruction difficulty is shown and discussed. 展开更多
关键词 quantum teleportation CRITERION transformation operator generalized Bell-state measurement
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Carleson Measure Characterization of Bloch Functions 被引量:1
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作者 Lou Zengjian Lou Zengjian Department of Mathematics Qufu Normal University Qufu,273165 China and Institute of Mathematics Academia Sinica Beijing,100080 China e-mail:Ijlou@math03.math.ac.cn 《Acta Mathematica Sinica,English Series》 SCIE CSCD 1996年第2期175-184,共10页
We give several equivalences of Bloch functions and little Bloch funetions.Using these results we obtain the generalized Carleson measure characterization of Bloch functions and the generalized vanishing Carleson meas... We give several equivalences of Bloch functions and little Bloch funetions.Using these results we obtain the generalized Carleson measure characterization of Bloch functions and the generalized vanishing Carleson measure characterization of little Bloch functions,that is,f ∈ B if and only if |D<sup>β</sup>f(z)|<sup>p</sup>(1-|z|<sup>2</sup>)<sup>βp-1</sup>dm(z)is a generalized Carleson measure; f ∈ B<sub>0</sub> if and only if |D<sup>β</sup>f(z)|<sup>p</sup>(1-|z|<sup>2</sup>)<sup>βp-1</sup>dm(z)is a generalized vanishing Carleson measure,where D<sup>β</sup>f(β】0)is the fractional derivative of analytic function f of order β,m denotes the normalised Lebesgue measure. 展开更多
关键词 Bloch space Carleson measure generalized Carleson measure
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Weighted estimating equation: modified GEE in longitudinal data analysis 被引量:1
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作者 Tianqing LIU Zhidong BAI Baoxue ZHANG 《Frontiers of Mathematics in China》 SCIE CSCD 2014年第2期329-353,共25页
The method of generalized estimating equations (GEE) introduced by K. Y. Liang and S. L. Zeger has been widely used to analyze longitudinal data. Recently, this method has been criticized for a failure to protect ag... The method of generalized estimating equations (GEE) introduced by K. Y. Liang and S. L. Zeger has been widely used to analyze longitudinal data. Recently, this method has been criticized for a failure to protect against misspecification of working correlation models, which in some cases leads to loss of efficiency or infeasibility of solutions. In this paper, we present a new method named as 'weighted estimating equations (WEE)' for estimating the correlation parameters. The new estimates of correlation parameters are obtained as the solutions of these weighted estimating equations. For some commonly assumed correlation structures, we show that there exists a unique feasible solution to these weighted estimating equations regardless the correlation structure is correctly specified or not. The new feasible estimates of correlation parameters are consistent when the working correlation structure is correctly specified. Simulation results suggest that the new method works well in finite samples. 展开更多
关键词 CONSISTENCY CORRELATION EFFICIENCY (GEE) longitudinal data positive definite estimating equation (WEE) generalized estimating equation repeated measures WEIGHTED
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quantum discord geometric measure quantum phase transition
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作者 崔海涛 田俊龙 杨癸 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第2期154-164,共11页
A generalization of the geometric measure of quantum discord is introduced in this article, based on Hellinger distance. Our definition has virtues of computability and independence of local measurement. In addition i... A generalization of the geometric measure of quantum discord is introduced in this article, based on Hellinger distance. Our definition has virtues of computability and independence of local measurement. In addition it also does not suffer from the recently raised critiques about quantum discord. The exact result can be obtained for bipartite pure states with arbitrary levels, which is completely determined by the Schmidt decomposition. For bipartite mixed states the exact result can also be found for a special case. Furthermore the generalization into multipartite case is direct. It is shown that it can be evaluated exactly when the measured state is invariant under permutation or translation. In addition the detection of quantum phase transition is also discussed for Lipkin–Meshkov–Glick and Dicke model. 展开更多
关键词 A generalized Geometric measurement of Quantum Discord:Exact Treatment
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