报告题目：Matter-wave solitons in degenerate quantum gases under linear and nonlinear quantum controls
简并量子气体中的物质波孤子：线性/非线性量子调控
报告人：曾健华副研究员(中国科学院西安光学精密研究所)
报告时间：2019-12-2上午10:30
报告地点：沧海校区致腾楼223（欢迎前往聆听）
报告摘要：
Compared to the condensed-matter and solid-state physics, Bose-Einstein condensate (BEC) offers a much clearer and highly controllable platform for investigating various intriguing emergent nonlinear effects that appear too in other physical settings, including bright and dark solitons in mean-field theory as well as many-body physics. Many ways have been elaborated to stabilize bright solitons in the BEC, three promising schemes include: optical lattices formed by counter-propagating laser beams, nonlinear managements mediated by Feshbach resonance, spin-orbit coupling engineered by dressing atomic spin states (hyperfine states of spinor atomic BEC) with laser beams. Theoretical results of matter-wave solitons and vortical ones in ultracold atoms using linear and nonlinear dynamical quantum control methods: optical lattices and the purely inhomogeneous nonlinearities via an essential tool (Feshbach resonance), will be given in this talk.
报告人简介：
曾健华 1981年3月，籍贯广东韶关，中国科学院西安光机所瞬态光学与光子技术国家重点实验室副研究员、博导，主要从事原子分子和光物理的理论研究。2004年广东教育学院（现广东第二师范学院）物理学学士，2010年3月获中山大学与以色列联合培养光学博士学位，之后于以色列特拉维夫大学和清华大学物理系从事博士后研究工作。 2013年8月起任西安光机所副研，2014年1-7月在美国中佛罗里达大学CREOL作访问学者，2015年被评为西安光机所和中国科学院大学博士生导师。
研究兴趣包括：（1）超快光学：阿秒或飞秒超快现象理论。（2）涌现非线性现象：非线性动力学方程解析解、近似解，波色-爱因斯坦凝聚(BEC)动力学特性，自聚焦和自散焦非线性光传播和局域(局域态)，孤子、涡旋子和拓扑激发结构等。（3）其它：量子光学、少体和多体物理理论，以及高维度高效率数值计算方法。
相关论文：
1.Liangwei Zeng and Jianhua Zeng*, Gap-type dark localized modes in a Bose-Einstein condensate with optical lattice, Advanced Photonics 1, 046004, (2019).
2.Liangwei Zeng, Jianhua Zeng*, Y. V. Kartashov and B. A. Malomed, Purely Kerr nonlinear model admitting flat-top solitons, Opt. Lett. 44, 1206, (2019).
3.Liangwei Zeng and Jianhua Zeng*, 1D solitons in fractional Schrödinger equation with a spatially periodical modulated nonlinearity: nonlinear lattice, Opt. Lett. 44, 2661, (2019).
4.Liangwei Zeng and Jianhua Zeng*, 1D gap solitons in quintic and cubic–quintic fractional nonlinear Schrödinger equations with a periodically modulated linear potential, Nonlinear Dyn. 98, 985, (2019).
5.Liangwei Zeng and Jianhua Zeng*, Gaussian-like and flat-top solitons of atoms with spatially modulated repulsive interactions, J. Opt. Soc. Am. B 36, 2278, (2019).
