Showing 2006 · quant-phShow all

27 papers · 2 filters

quant-ph2006★ 152 cited

Circular quantum secret sharing

Fu-Guo Deng, Hong-Yu Zhou andGui Lu Long

A circular quantum secret sharing protocol is proposed, which is useful and efficient when one of the parties of secret sharing is remote to the others who are in adjacent, especia…

quant-ph2006★ 117 cited

Security of decoy-state quantum key distribution with inexactly controlled source

Xiang-Bin Wang, Cheng-Zhi Peng, Jun Zhang +1

We show the unconditional security of decoy-state method quantum cryptography with whatever intensity error pattern provided that the error is not too large. Our result immediately…

quant-ph2006★ 109 cited

Distinguishing Arbitrary Multipartite Basis Unambiguously Using Local Operations and Classical Communication

Runyao Duan, Yuan Feng, Zhengfeng Ji +1

We show that an arbitrary basis of a multipartite quantum state space consisting of distant parties such that the th party has local dimension always contains at least…

quant-ph2006★ 3 cited

Generation of Long-Lived Isomeric States via Bremsstrahlung Irradiation

Yao Cheng, Bing Xia, Chuanxiang Tang +2

A method to generate long-lived isomeric states effectively for Mossbauer applications is reported. We demonstrate that this method is better and easier to provide highly sensitive…

quant-ph2006★ 15 cited

Discrimination between pure states and mixed states

Chi Zhang, Guoming Wang, Mingsheng Ying

In this paper, we discuss the problem of determining whether a quantum system is in a pure state, or in a mixed state. We apply two strategies to settle this problem: the unambiguo…

quant-ph2006

Resonant Propagation of Entangled Rhodium Mossbauer Gammas

Yao Cheng, Zhongming Wang

We report the resonant propagation of the long-lived Mossbauer gamma in the time-resolved Mossbauer spectroscopy. Recently, three entangled gammas emitted from the E3 rhodium Mossb…

quant-ph2006★ 102 cited

Practical decoy state method in quantum key distribution with heralded single photon source

Qin Wang, Xiang-Bin Wang, Guang-Can Guo

We propose a practical decoy state method with heralded single photon source for quantum key distribution (QKD). In the protocol, 3 intensities are used and one can estimate the fr…

quant-ph2006★ 43 cited

Geometric phase of an atom in a magnetic storage ring

P. Zhang, L. You

A magnetically trapped atom experiences an adiabatic geometric (Berry's) phase due to changing field direction. We investigate theoretically such an Aharonov-Bohm-like geometric ph…

quant-ph2006★ 119 cited

Parameter estimation of quantum channels

Zhengfeng Ji, Guoming Wang, Runyao Duan +2

The efficiency of parameter estimation of quantum channels is studied in this paper. We introduce the concept of programmable parameters to the theory of estimation. It is found th…

quant-ph2006★ 48 cited

Simple protocol for secure decoy-state quantum key distribution with a loosely controlled source

Xiang-Bin Wang, Cheng-Zhi Peng, Jian-Wei Pan

The method of decoy-state quantum key distribution (QKD) requests different intensities of light pulses. Existing theory has assumed exact control of intensities. Here we propose a…

quant-ph2006★ 80 cited

Efficient one-step generation of large cluster states with solid-state circuits

J. Q. You, Xiang-bin Wang, Tetsufumi Tanamoto +1

Highly entangled states called cluster states are a universal resource for measurement-based quantum computing (QC). Here we propose an efficient method for producing large cluster…

quant-ph2006★ 71 cited

Secure and efficient decoy-state quantum key distribution with inexact pulse intensities

X. B. Wang

We present a general theorem for the efficient verification of the lower bound of single-photon transmittance. We show how to do decoy-state quantum key distribution efficiently wi…

quant-ph2006★ 12 cited

Controlled splitting of an atomic wave packet

M. Zhang, P. Zhang, M. S. Chapman +1

We propose a simple scheme capable of adiabatically splitting an atomic wave packet using two independent translating traps. Implemented with optical dipole traps, our scheme allow…

quant-ph2006★ 21 cited

Prime Factorization in the Duality Computer

Wan-Ying Wang, Bin Shang, Chuan Wang +1

We give algorithms to factorize large integers in the duality computer. We provide three duality algorithms for factorization based on a naive factorization method, the Shor algori…

quant-ph2006★ 389 cited

Experimental Long-Distance Decoy-State Quantum Key Distribution Based On Polarization Encoding

Cheng-Zhi Peng, Jun Zhang, Dong Yang +7

We demonstrate the decoy-state quantum key distribution (QKD) with one-way quantum communication in polarization space over 102km. Further, we simplify the experimental setup and u…

quant-ph2006★ 1 cited

Majorization in Quantum Adiabatic Algorithms

Zhaohui Wei, Zhengfeng Ji, Mingsheng Ying

The majorization theory has been applied to analyze the mathematical structure of quantum algorithms. An empirical conclusion by numerical simulations obtained in the previous lite…

quant-ph2006★ 1 cited

Quantum loop programs

Mingsheng Ying, Yuan Feng

Loop is a powerful program construct in classical computation, but its power is still not exploited fully in quantum computation. The exploitation of such power definitely requires…

quant-ph2006★ 30 cited

The Simple Criteria of SLOCC Equivalence Classes

D. Li, X. Li, H. Huang

We put forward an alternative approach to the SLOCC classification of entanglement states of three-qubit and four-qubit systems. By directly solving matrix equations, we obtain the…

quant-ph2006★ 7 cited

The Necessary and Sufficient Conditions of Separability for Multipartite Pure States

D. Li, H. Huang, X. Li

In this paper we present the necessary and sufficient conditions of separability for multipartite pure states. These conditions are very simple, and they don't require Schmidt deco…

quant-ph2006★ 19 cited

Optimal dense coding with arbitrary pure entangled states

Yuan Feng, Runyao Duan, Zhengfeng Ji

We examine dense coding with an arbitrary pure entangled state sharing between the sender and the receiver. Upper bounds on the average success probability in approximate dense cod…

quant-ph2006★ 15 cited

Fixed-point Quantum Search for Different Phase Shifts

D. Li, X. Li, H. Huang

Grover recently presented the fixed-point search algorithm. In this letter, we study the fixed-point search algorithm obtained by replacing equal phase shifts of by different…

quant-ph2006★ 5 cited

Performance of Equal Phase-Shift Search for One Iteration

D. Li, J. P. Chen, X. Li +1

Grover presented the phase-shift search by replacing the selective inversions by selective phase shifts of . In this paper, we investigate the phase-shift search with general…

quant-ph2006★ 356 cited

Multi-step quantum secure direct communication using multi-particle Green-Horne-Zeilinger state

Chuan Wang, Fu Guo Deng, Gui Lu Long

A multi-step quantum secure direct communication protocol using blocks of multi-particle maximally entangled state is proposed. In this protocol, the particles in a Green-Horne-Zei…

quant-ph2006★ 18 cited

Boundary effect of deterministic dense coding

Zhengfeng Ji, Yuan Feng, Runyao Duan +1

We present a rigorous proof of an interesting boundary effect of deterministic dense coding first observed by Mozes et al. [Phys. Rev. A 71, 012311 (2005)]. Namely, it is shown tha…