Abstract
Using a cold atomic gas exposed to laser pulses—a realization of the chaotic quasiperiodic kicked rotor with three incommensurate frequencies—we study experimentally and theoretically the Anderson metal-insulator transition in three dimensions. Sensitive measurements of the atomic wave function and the use of finite-size scaling techniques make it possible to unambiguously demonstrate the existence of a quantum phase transition and to measure its critical exponents. By taking proper account of systematic corrections to one-parameter scaling, we show the universality of the critical exponent , which is found to be equal to the one previously computed for the Anderson model.
8 More- Received 20 July 2009
DOI:https://doi.org/10.1103/PhysRevA.80.043626
©2009 American Physical Society