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- Sun Yat-sen UniversityCN37 papers
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6 papers · 1 filter
Constructing all entanglement witnesses from density matrices
Bang-Hai Wang, Dong-Yang Long
We demonstrate a general procedure to construct entanglement witnesses for any entangled state. This procedure is based on the trace inequality and a general form of entanglement w…
Nonlocal bright spatial solitons in defocusing Kerr media supported by PT symmetric potentials
Zhiwei Shi, Huagang Li, Xing Zhu +1
It is studied the bright spatial solitons in nonlocal defocusing Kerr media with parity-time (PT) symmetric potentials. We find that these solitons can exist and be stable over a d…
Quasi-compactons in inverted nonlinear photonic crystals
Yongyao Li, Boris A. Malomed, Jianxiong Wu +3
We study large-amplitude one-dimensional solitary waves in photonic crystals featuring competition between linear and nonlinear lattices, with minima of the linear potential coinci…
Nonlocal gap solitons in parity-time symmetric optical lattices
Huagang Li, Xiujuan Jiang, Xing Zhu +1
We numerically study the nonlocal gap solitons in parity-time (PT) symmetric optical lattices built into a nonlocal self-focusing medium. We state the existence, stability, and pro…
Structural physical approximations and entanglement witnesses
Bang-Hai Wang, Dong-Yang Long
The structural physical approximation (SPA) to a positive map is considered to be one of the most important method to detect entanglement in the real physical world. We first show…
Computation for Supremal Simulation-Based Controllable and Strong Observable Subautomata
Yajuan Sun, Hai Lin, Fuchun Liu
Bisimulation relation has been successfully applied to computer science and control theory. In our previous work, simulation-based controllability and simulation-based observabilit…