Dynamics and statistical mechanics of ultra-cold Bose gases using c-field techniques
报告人:
P Blair Blakie
Dr. Department of Physics and Jack Dodd Centre for Quantum Technology, University of Otago
报告时间:
2010-06-18 15:30
报告地点:
理科楼三楼报告厅
主办单位:
物理系
简介:
报告摘要：I will discuss phase space techniques based on the Wigner representation that provide an approximate description of dilute ultra-cold Bose gases. In this approach the quantum field evolution can be represented using equations of motion of a similar form to the Gross-Pitaevskii equation but with stochastic modifications that include quantum effects in a controlled degree of approximation. These techniques provide a practical quantitative description of both equilibrium and dynamical properties of Bose gas systems. We develop versions of the formalism appropriate to zero temperature, where quantum fluctuations can be important, and at finite temperature where thermal fluctuations dominate. Applications to a wide range of phenomena will be discussed.
