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  1. No Access

    Article

    Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT

    Low-frequency quasiperiodic oscillations (LFQPOs) are commonly found in black hole X-ray binaries, and their origin is still under debate. The properties of LFQPOs at high energies (above 30 keV) are closely r...

    **ang Ma, Lian Tao, Shuang-Nan Zhang, Liang Zhang, Qing-Cui Bu… in Nature Astronomy (2021)

  2. No Access

    Article

    Enhancing parameter estimation precision by non-Hermitian operator process

    Recently, Zhong et al. (Phys Rev A 87:022337, 2013) investigated the dynamics of quantum Fisher information (QFI) in the presence of decoherence. We here reform their results and propose two schemes to enhance an...

    You-neng Guo, Mao-fa Fang, Guo-you Wang, Jiang Hang… in Quantum Information Processing (2017)

  3. No Access

    Article

    Generation and protection of steady-state quantum correlations due to quantum channels with memory

    We have proposed a scheme of the generation and preservation of two-qubit steady-state quantum correlations through quantum channels where successive uses of the channels are correlated. Different types of noi...

    You-neng Guo, Mao-fa Fang, Guo-you Wang, Ke Zeng in Quantum Information Processing (2016)

  4. No Access

    Article

    Distillability sudden death and sudden birth in a two-qutrit system under decoherence at finite temperature

    Distillability sudden death and sudden birth in a two-qutrit system locally subject to amplitude dam** channel at a finite temperature have been studied in detail. By using the negativity and the realignment...

    You-neng Guo, Mao-fa Fang, Guo-you Wang, Ke Zeng in Quantum Information Processing (2016)