CMSP Seminar @ICTP Stasi, Thursday 28 June at 11am - ANGELONE

[CM Section]

Condensed Matter and Statistical Physics Seminar

Thursday 28 June at 11:00 a.m.
Luigi Stasi Seminar Room, first floor, Leonardo building
----------------------------------------------------------------------------

Strongly Correlated Systems of Bosons and Fermions:
Many-body Phenomena and Numerical Methods

Adriano ANGELONE
Lab. Physique Quantique, ISIS IPCMS, Strasbourg, France

Abstract:

Many interesting physical phenomena are connected to strongly correlated 
systems, which, due to their complexity, cannot usually be studied 
analitically, making numerical approaches essential. The development of 
the latter and the study of the physical scenarios induced by strong 
correlations are therefore both of great importance. In this context, I 
will present the results of my numerical investigations of strongly 
correlated systems: specifically, i) the ground-state phase diagram of a 
bosonic cluster-forming model of interest for cold atom experiments, as 
well as ii) the ground-state properties of the fermionic t-J model, a 
candidate Hamiltonian to describe high-T_c superconductivity, in the 
presence of two mobile holes. Path Integral and Variational Monte Carlo 
have been chosen as numerical techniques for thetwo problems, 
respectively. The main results I will discuss are the demonstration of a 
ground-state supersolid-supersolid transition in the bosonic scenario, 
and of a d-wave hole bound state in the fermionic model. My 
investigation of the latter in the 2-hole case is foundational for the 
application of my approach of choice to other problems, of direct 
interest for high-T_c superconductivity, where the physical picture is 
still unclear (such as the case of finite hole concentration).