Seminar on Disorder and strong electron correlations: "The atomic quasi-periodic kicked rotor: Experimental test of the universality of the Anderson transition, critical behaviour and large fluctuations"
Starts 1 Dec 2011 16:00
Ends 1 Dec 2011 20:00
Central European Time
Leonardo da Vinci Building Luigi Stasi Seminar Room
Strada Costiera, 11
I - 34151 Trieste (Italy)
The quasi-periodic kicked rotor is a one-dimensional system displaying the same metal-insulator Anderson transition than a usual 3D disordered system. This model can be experimentally realized using a cold atomic gas, allowing for a direct measurement of the temporal dynamics. Accurate measurements of the atomic wavefunction dynamics and the use of finite-size scaling techniques make it possible to measure with a good precision the value of the critical exponent \nu and to test its universality. We also study the spatio-temporal evolution of the wavefunction at the critical point, and show that it is well described at short times by self-consistent theory of localization. At long times - probably not accessible to the present generation of experiments - large deviations are observed, related to the multifractal character of the wavefunctions.
ICTP - Strada Costiera, 11
I - 34151 Trieste Italy (+39) 040 2240 111 firstname.lastname@example.org