For distribution - thnks

[CM ICTP - Trieste]

CONDENSED MATTER SECTION

	
SEMINAR on   Disorder and strong electron correlations




Tuesday, 29 May   -    4:00 p.m.



Lecture Room 'C',  Main Bldg.- terrace level



A. ALTLAND   ( Universität zu Köln )


"New developments in quantum chaos"

Abstract

	The last few years have witnessed drastic advances in the field of 
quantum chaos: building on a fundamentally new understanding of quantum 
interference, novel analytic approaches to quantitatively describe 
mesoscopic phenomena in chaotic systems (similar in nature to the 
impurity diagram techniques of disordered systems) have been developed. 
  These new theoretical potentials have made it possible to finally 
explain the basis of universality - i.e. the phenomenon that the 
spectra of individual chaotic systems behave according to the 
phenomenological predictions of random matrix theory.  They have also 
been applied to successfully address a spectrum of mesoscopic 
fluctuation phenomena,  both in thermodynamics and transport.  All in 
all, the theory of mesoscopic fluctuations in /individual /chaotic 
systems finally seems to have leveled with the previously much higher 
developed theory of disordered electronic systems.  In this talk I will 
give an overview of the most important recent developments. Some 
emphasis will be put on elucidating parallels between the different 
approaches to the problem, notably between periodic orbit theory and 
quantum field theory.