Phys. Rev. Lett. 105, 090601 (2010) [4 pages]Critical State of the Anderson Transition: Between a Metal and an Insulator
See accompanying Physics Synopsis Using a three-frequency one-dimensional kicked rotor experimentally realized with a cold atomic gas, we study the transport properties at the critical point of the metal-insulator Anderson transition. We accurately measure the time evolution of an initially localized wave packet and show that it displays at the critical point a scaling invariance characteristic of this second-order phase transition. The shape of the momentum distribution at the critical point is found to be in excellent agreement with the analytical form deduced from the self-consistent theory of localization. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.105.090601
DOI:
10.1103/PhysRevLett.105.090601
PACS:
05.60.Gg, 03.75.-b, 05.30.Rt, 72.15.Rn
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