Thursday's seminar

[Cond.Matt. & Stat.Mech.Section]

SEMINAR on   Disorder and strong electron correlations





Thursday, 15 October      -  11:00 a.m.





Seminar Room,  Leonardo Building - first floor





Gunes SOYLER    ( The Abdus Salam ICTP )





"Novel superfluid states in bosonic systems"



Abstract

In this talk, I will discuss unconventional superfluid states of  
various bosonic systems and present benchmark calculations for the  
ground state and finite temperature phase diagrams.  The method of  
study is based on quantum Monte Carlo simulations by the Worm  
algorithm.  The two qualitatively different systems to be discussed  
are: i) superfluidity of lower dimensional objects, i.e. dislocations  
and defects, embedded in solid structures both in optical lattices and  
in realistic systems such as 4-He. ii) the two-component Bose-Hubbard  
model.  Bosonic optical lattice systems are also interesting for  
studies of quantum magnetism where under certain conditions they can  
be mapped onto various spin Hamiltonians.  On the other hand,  
superfluid dislocations in 4-He are an important subject for their  
relevance to supersolid behavior observed in solid 4-He.