Multifloquet to single channel transition in the electronic dc response of driven disorded rings

MARÍA JOSÉ SÁNCHEZ; FEDERICO FOIERI, LILIANA ARRACHEA

Conferencia; Multifloquet to single channel transition in the electronic dc r Worskhop on New Frontiers in Quantum Chaos; 2008

MPIKS

We investigate the dc response of a 1D disordered ring coupled to a reservoir and driven by a magneticflux with a linear dependence on time. We identify two regimes: (i) A localized or large length L regime,characterized by a dc conductance, g dc , whose probability distribution P g dc is identical to the oneexhibited by a 1D wire of the same length L and disorder strength placed in a two terminal Landauer setupand (ii) a multifloquet regime for small L and weak coupling to the reservoir, which exhibits large currentsand conductances that can be g dc > 1, in spite of the fact that the ring contains spinless electrons and asingle electronic transmission channel. The crossover length between the multifloquet to the single-channel transport regime L c is controlled by the coupling to the reservoir.