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Quantum phase transitions in the quasi-periodic kicked rotor | | Chushun Tian
; Alexander Altland
; Markus Garst
; | | Date: |
17 Jan 2011 | | Abstract: | We present a microscopic theory of transport in quasi-periodically driven
environments (’kicked rotors’), as realized in recent atom optic experiments.
We find that the behavior of these systems depends sensitively on the value of
Planck’s constant $ ilde h$: for irrational values of $ ilde h/(4pi)$ they
fall into the universality class of disordered electronic systems and we derive
the microscopic theory of the ensuing localization phenomena. In contrast, for
rational values the rotor-Anderson insulator acquires an infinite (static)
conductivity and turns into a ’super-metal’. Signatures of the corresponding
metal/super-metal transition are discussed. | | Source: | arXiv, 1101.3206 | | Services: | Forum | Review | PDF | Favorites | |
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