主 講 人：方萍

地　　點(diǎn)：祥聯(lián)廳

主 辦 方：物理與信息工程學(xué)院

開(kāi)始時(shí)間：2019-09-26 15:00

報(bào)告人簡(jiǎn)介：北京郵電大學(xué)理學(xué)院物理系特聘副研究員。主要從事量子混沌及無(wú)序介質(zhì)中波傳播的研究。

內(nèi)容簡(jiǎn)介：The foundations of statistical physics are currently under renovations. A number of scenarios for the arising of statistical physics in an individual system has been proposed. However, moststudies have focused on equilibrium statistical physics. In this talk, I shall report our recent progress on the fundamentals of nonequilibrium statistical physics. I will show a theory for structures and fluctuations of waves in individual disordered media, using the mathematical tool of the concentration of measure. Applying this theory, wecansee how the elementary nonequilibrium process of diffusion can arise from a single scattering state of wave equation, without the canonical hypothesis of ensembles. Furthermore, fluctuations associated with the change in incoming waves exhibit a new kind of universalities, which does not exist in conventional mesoscopic fluctuations associated with the change in disorder realizations, and originate from the coherence between the natural channels of waves – the transmission eigenchannels.