Bright Matter-Wave Solitons in Atomic Bose-Einstein condensates
报 告 人（Speaker）：Edmonds Matthew（日本冲绳科学技术研究所，博士后）
报告时间（Time）：2018年12月12 日 （周三） 上午 10：00
Atomic Bose-Einstein condensates represent a powerful tool with which we can investigate and simulate many novel effects, owing largely to impressive experimental progress over the last two decades with these macroscopic atomic systems. Most of these experiments are performed with repulsive interactions, where a short-range inter-atomic repulsion exists that can for example facilitate the superfluid state in these macroscopic systems. Complimentary to this, there have also been several experiments producing atomic condensates with attractive inter-particle interactions. The ground state of an attractive Bose-Einstein condensate is a bright matter-wave soliton, which possess many impressive characteristics such as propagating over great distances while maintaining their shape, and surviving collisions with other bright solitons.
In this talk I will present our most recent results on atomic bright matter-wave solitons. In the first part, I will address some of the current experimental challenges in creating these fragile states by proposing a novel protocol that aims to produce these states with improved fidelity over current experimental protocols. We then explore the fidelity of this protocol by exploring the effect of quantum fluctuations and also the finite-time quench dynamics of the gas. Atomic condensates are typically very pure systems, with a negligible number of non-condensate atoms present. In the second part of my presentation, I will explore the result of coupling impurity atoms to a matter-wave bright soliton, in particular focusing on using the soliton to 'trap' the impurity atoms. We then explore the quantum transport of impurities within multiple bright solitons, and demonstrate the coherent nature of the impurities dynamics, and further show how the impurity undergoes a type of dynamical localization transition.