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  1. No Access

    Article

    Twin-field quantum key distribution over a 511 km optical fibre linking two distant metropolitan areas

    The basic principle of quantum mechanics1 guarantees the unconditional security of quantum key distribution (QKD)2–6 at the cost of forbidding the amplification of a quantum state. As a result, and despite remark...

    Jiu-Peng Chen, Chi Zhang, Yang Liu, Cong Jiang, Wei-Jun Zhang… in Nature Photonics (2021)

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    Article

    Decoherence and Fidelity in Teleportation of Coherent Photon-Added Two-Mode Squeezed Thermal States

    We theoretically introduce a kind of non-Gaussian entangled resources, i.e., coherent photon-added two-mode squeezed thermal states (CPA-TMSTS), by successively performing coherent photon addition operation to...

    Heng-Mei Li, Hong-Chun Yuan, Zhi-Long Wan… in International Journal of Theoretical Physi… (2018)

  3. Article

    Open Access

    Quantum gambling based on Nash-equilibrium

    The problem of establishing a fair bet between spatially separated gambler and casino can only be solved in the classical regime by relying on a trusted third party. By combining Nash-equilibrium theory with q...

    Pei Zhang, **ao-Qi Zhou, Yun-Long Wang, Bi-Heng Liu… in npj Quantum Information (2017)

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  4. No Access

    Article

    Statistical Properties of Photon-Added Two-Mode Squeezed Coherent States

    The nonclassical and non-Gaussian quantum states—photon-added two-mode squeezed coherent states have been theoretically introduced by adding multiple photons to each mode of the two-mode squeezed coherent stat...

    Zhen Wang, Heng-Mei Li, Hong-Chun Yuan… in International Journal of Theoretical Physi… (2017)

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    Article

    A New Kind of Bipartite Coherent-Entangled State and Its Applications in Quantum Optics

    A new kind of bipartite coherent-entangled state (CES) is introduced in the two-mode Fock space which exhibits the properties of both coherent state and entangled state. The set of CESs make up a complete and ...

    **ang-Guo Meng, Ji-Suo Wang, Bao-Long Liang in International Journal of Theoretical Physics (2011)

  6. No Access

    Article

    Generalized Canonical Ward Identities

    In the framework of Faddeev-Senjanovic (FS) path-integral quantization, CP 1 nonlinear σ model coupled to Non-Abelian Chern-Simons (CS) fields is quantized. Generalized canonical Ward iden...

    Yong-Long Wang in International Journal of Theoretical Physics (2009)

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    Article

    Quantal Symmetries in the Non-Linear Sigma Model with Maxwell–Chern–Simons Term

    The quantal symmetry property in the CP1 non-linear sigma model with Abelian–Maxwell–Chern–Simons (AMCS) term in 2 + 1 dimensions is studied. In the Coulomb gauge, the system is quantized in the Faddeev–Senjan...

    Wang Yong-Long, Wang Yong-Long, Li Zi-** in International Journal of Theoretical Physics (2004)

  8. No Access

    Article

    Quantal Symmetries in the Nonlinear Sigma Model with Maxwell–Chern–Simons Term

    The quantal symmetry property in the CP1 nonlinear sigma model with Abelian–Maxwell–Chern–Simons (AMCS) term in 2 + 1 dimensions is studied. In the Coulomb gauge, the system is quantized in the Faddeev–Senjanovic...

    Wang Yong-long, Li Zi-** in International Journal of Theoretical Physics (2004)