NCTS (South)


DATE2014-04-21

TIME12:10

PLACER49223, Second Physics Building , NCKU

FIELDQuantum Information Science

SPEAKER Prof. Guin-Dar Lin(林俊達) - 台灣大學物理系

TITLESuperradiance and cooperativity -- A mean-field approach for various systems

ABSTRACTCooperative effects, which arise from the exchange interaction between particles, are interesting quantum many-body phenomena. A very important example is superradiance, also known as superfluorescence. As first predicted by Dicke in 1954, superradiance describes a drastic increase of radiation due to presence of identical particles, along with the build-up of collective dipoles. In order to catch the mechanism and study the dynamics, we develop a mean-field approach which takes into account the inter-particle coherence. Further, with this method, we are able to investigate the role of dipole-dipole interaction, and other associated phenomena, e.g. the collective Lamb shift.