Seminarium Fizyki Materii Skondensowanej
Sala Duża Teoretyczna, ul. Hoża 69
2013-10-18 (12:15) 
Marcin Napiórkowski (KMMF)
Excitation spectrum of interacting bosons in the mean-field infinite-volume limit
The excitation spectrum of the interacting Bose gas - in contrast to theground state energy - is an object that, in spite of its physical meaning,has for many years not been analyzed form a rigorous point of view. Thissituation has changed in the last three years. During my talk I shallpresent recent rigorous results regarding the justification of theBogoliubov approximation- a key tool in the study of the excitationspectrum.