Gui-Hua Zeng

Shanghai Jiao Tong University, Shanghai, Shanghai Shi, China

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Publications (9)8.98 Total impact

  • Peng Huang · Da-kai Lin · Duan Huang · Gui-Hua Zeng
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    ABSTRACT: Phase compensation is a necessary procedure in practical application of continuous-variable quantum key distribution (CVQKD) for the reason of unavoidable phase drifts of quantum signals in quantum channel. However, the phase compensation may become imperfect in practical applications. The security of CVQKD scheme with imperfect phase compensation is investigated under realistic conditions of quantum channel and detector. In particular, a tight security bound to the phase noise of the imperfect phase compensation are derived for reverse reconciliation and realistic homodyne detection. Moreover, the phase noise is analyzed experimentally and a practical phase compensation procedure is applied to simulate the imperct processing. The simulation results show its coincidence to the security bound, and reveal the sensitivity of the security of the reverse reconciliation CVQKD protocol to the noise arising from imperfect phase compensation.
    International Journal of Theoretical Physics 08/2015; 54(8). DOI:10.1007/s10773-014-2492-z · 1.18 Impact Factor
  • Source
    Jing-Zheng Huang · Qin-Zheng Li · Chen Fang · Gui-Hua Zeng
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    ABSTRACT: By exploiting the hyperentanglement, we propose a new concrete scheme to realize weak value amplification, which can be implemented by N hyperentangled photons along with coincidence detection. Our scheme can optimally increase the amplification factor by a factor of N compared to the usage of N uncorrelated photons, and achieve the Heisenberg limit for the purpose of parameter estimation. We expect our study can inspire a further investigation on the usage of hyperentanglement in weak measurement and quantum metrology.
    Journal of Physics B Atomic Molecular and Optical Physics 08/2015; 48(19). DOI:10.1088/0953-4075/48/19/195501 · 1.98 Impact Factor
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    ABSTRACT: In the quantum metrology, applications of quantum techniques based on entanglement bring in some better performances than conventional approaches. We experimentally investigate an application of entanglement in accurate ranging based on the second-order coherence in the time domain. By a fitting algorithm in the data processing, the optimization results show a precision of ±200 μm at a distance of 1043.3m. In addition, the influence of jamming noise on the ranging scheme is studied. With some different fitting parameters, the result shows that the proposed scheme has a powerful anti-jamming capability for white noise.
    Chinese Physics Letters 10/2013; 30(10):0301-. DOI:10.1088/0256-307X/30/10/100301 · 0.95 Impact Factor
  • Peng Huang · Guang-Qiang He · Gui-Hua Zeng
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    ABSTRACT: Coherent source of continuous-variable quantum key distribution (CV QKD) system may become noisy in practical applications. The security of CV-QKD scheme with the noisy coherent source is investigated under realistic conditions of quantum channel and detector. In particular, two models are proposed to characterize the noisy coherent source through introducing a party (Fred) who induces the noise with an optical amplifier. When supposing the party Fred is untrusted, two lower security bounds to the noise of the coherent source are derived for reverse reconciliation and realistic homodyne and heterodyne detections. While supposing Fred is a neutral party, we derive two tight security bounds without knowing Fred’s exact state for ideal detections. Moreover, the simulation results show that the security of the reverse reconciliation CV-QKD protocols is very sensitive to the noise of coherent source for both the homodyne and heterodyne detections.
    International Journal of Theoretical Physics 05/2013; 52(5). DOI:10.1007/s10773-012-1475-1 · 1.18 Impact Factor
  • Peng Huang · Jun Zhu · Xiao-xiao Qi · Guang-qiang He · Gui-hua Zeng
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    ABSTRACT: The dynamics of classical and quantum correlations under nondissipative and dissipative decoherences are analytically and numerically investigated with both one-side measures and two-side measures. Specifically, two qubits under local amplitude damping decoherence and depolarizing decoherence channels are considered. We show that, under the action of amplitude damping decoherence, both the entanglement and correlations of the different types of initial states with same initial values, suffer different types of dynamics. Moreover, the transfers of the entanglement and correlations between the system and the environment for different types of initial states are also shown to be different. While for the action of depolarizing decoherence, there does not exist sudden change in the decay rates of both the classical and quantum correlations, which is different from some other nondissipative channels. Furthermore, the quantum dissonance can be found to keep unchanged under the action of depolarizing decoherence. Such different dynamic behaviors of different noisy quantum decoherence channels reveal distinct transmission performance of classical and quantum information.
    Quantum Information Processing 12/2012; 11(6). DOI:10.1007/s11128-011-0335-x · 1.92 Impact Factor
  • Peng Huang · Jun Zhu · Yuan Lu · Gui-Hua Zeng
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    ABSTRACT: Two continuous-variable quantum identity authentication schemes, which are utilized to prevent active attack, are presented by using Gaussian-modulated squeezed states. The proposed schemes can both verify user’s identity as well as distribute an updated new key as the authentication key. A new defined fidelity parameter is proposed to verify the identity of the communicator and detect eavesdropping. The analytical results show the feasibility of these two identity authentication schemes and the security under the attack of general Gaussian-cloner strategy and collective attack.
    International Journal of Quantum Information 03/2011; 9(2). DOI:10.1142/S0219749911007745 · 0.88 Impact Factor
  • Peng HUANG · Ye LIU · Nan-run ZHOU · Gui-hua ZENG
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    ABSTRACT: The security, efficiency, transmission distance and error rate are important parameters of a quantum key distribution scheme. In this article, the former two parameters are focused on. To reach high efficiency, an unsymmetrical quantum key distribution scheme that employs Greenberger-Horne-Zeilinger (GHZ) triplet states and dense coding mechanism is proposed, in which a GHZ triplet state can be used to share two bits of classical information. The proposed scheme can be employed in a noisy or lossy quantum channel. In addition, a general approach to security analysis against general individual attacks is presented.
    The Journal of China Universities of Posts and Telecommunications 06/2009; 16(3-16):114-121. DOI:10.1016/S1005-8885(08)60236-8
  • Jun-fang Xiao · Gui-hua Zeng
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    ABSTRACT: Security of wireless sensor network (WSN) is a considerable challenge, because of limitation in energy, communication bandwidth and storage. ID-based cryptosystem without checking and storing certificate is a suitable way used in WSN. But key escrow is an inherent disadvantage for traditional ID-based cryptosystem, i.e., the dishonest key generation center (KGC) can forge the signature of any node and on the other hand the node can deny the signature actually signed by him/herself. To solving this problem, we propose an ID-based ring signature scheme without trusted KGC. We also present the accurate secure proof to prove that our scheme is secure against existential forgery on adaptively chosen message and ID attacks assuming the complexity of computational Diffie-Hellman (CDH) problem. Compared with other ring signature schemes, we think proposed scheme is more efficient.
    Journal of Shanghai Jiaotong University (Science) 04/2009; 14(2):189-194. DOI:10.1007/s12204-009-0189-x
  • Source
    Da-Zu Huang · Ying Guo · Gui-Hua Zeng
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    ABSTRACT: A quantum secure direct intercommunication scheme is proposed to exchange directly the communicators' secret messages by making use of swapping entanglement of Bell states. It has great capacity to distribute the secret messages since these messages have been imposed on high-dimensional Bell states via the local unitary operations with superdense coding. The security is ensured by the secure transmission of the travel sequences and the application of entanglement swapping.
    Communications in Theoretical Physics 12/2008; 50(6):1290-1294. DOI:10.1088/0253-6102/50/6/08 · 0.89 Impact Factor

Publication Stats

15 Citations
8.98 Total Impact Points


  • 2011–2013
    • Shanghai Jiao Tong University
      • • State Key Laboratory of Advanced Optical Communication Systems and Networks
      • • Department of Electronic Engineering
      Shanghai, Shanghai Shi, China
  • 2009–2013
    • Shanghai University
      • Department of Electronic Engineering
      Shanghai, Shanghai Shi, China
  • 2008
    • Central South University
      • School of Information Science and Engineering
      Ch’ang-sha-shih, Hunan, China