Thursday's disorder

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

SEMINAR on   Disorder and strong electron correlations



Thursday, 4 March      -  11:00 a.m.



Seminar Room,  Leonardo Building - first floor





Michael KISELEV    ( I.C.T.P. )



"Slow noise in Landau-Zener theory"



Abstract



We study the influence of a slow classical noise on Landau-Zener  
transitions.  We demonstrate that the slow colored noise characterized  
by correlation time much greater compared to Landau-Zener time can  
produce a transition itself, or can change substantially the Landau- 
Zener transition probabilities.  Exact formulas for the time-evolution  
operator and finite time probabilities are derived. Connections  
between the slow noise induced Landau-Zener transitions and recent  
experiments on spin blockade in nano-devices are discussed.