复杂系统研究组9月29.30日学术报告会

2009-09-29 13:50:30 作者：benchong 来源： 浏览次数：0

报告人：Prof. Boris Svistunov of University of Massachusetts at Amherst.
 
Seminar:

报告1；
 
Introductory talk for students:

"Diagrammatic Monte Carlo and Worm Algorithm: State-of-the-Art Numerics for Quantum Statistics"

Without going into technical details, I will introduce powerful numeric tools that allow first-principle simulations of many-body quantum systems such as liquid helium, neutron matter, ultra-cold atoms, and many others. In particular, I will give a general idea of what Monte Carlo methods are all about, and what one means by quantum as opposed to classical Monte Carlo.

时间9月29日下午4点，近代物理系系楼210

报告2

"Localization of Interacting Bosons in a Lattice:  Interplay Between Disorder and Commensurability"

The interplay between disorder and interaction in a lattice bosonic system, at an integer filling, is by no means a mere synergy between Mott and Anderson localization scenarios. We prove a theorem resolving a 20-year-old controversy concerning the topology of the groundstate phase diagram of the system (featuring three phases: superfluid, Mott insulator and Bose glass). Numerically, we reveal an accurate--and rather curious--phase diagram of the 3D disordered Bose Hubbard model. The numeric results are perfectly consistent with our analytic findings.

时间9月30日上午10点，近代物理系系楼210