INFORMAL SEMINAR on Statistical Physics

[CM ICTP - Trieste]

CONDENSED MATTER AND STATISTICAL PHYSICS SECTION

	
INFORMAL SEMINAR  on  Statistical Physics





Tuesday, 20 November    -    12:30 p.m.



Seminar Room - Main Building 1st Floor


		


D. BASKO
( SISSA, Trieste )



" Many-Body Localization "



Abstract
We consider low-temperature behavior of weakly interacting electrons in 
disordered conductors in the regime when all single-particle 
eigenstates are localized by the quenched disorder. The key result is 
that in the absence of coupling of the electrons to any external bath 
dc electrical conductivity exactly vanishes as long as the temperature 
T does not exceed some finite value T_c. At the same time, it can be 
also proven that at high enough T the conductivity is finite. These two 
statement simply that the system undergoes a finite temperature 
metal-insulator transition, which can be viewed as Anderson-like 
localization of many-body wave functions in the Fock space. As a 
result, in the insulating phase electron-electron interaction alone is 
unable to cause the relaxation and establish the thermal equilibrium.