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# Search results

26 records were found.

## Experimental Test of the Dynamical Coulomb Blockade Theory for Short Coherent Conductors

Comment: 4 pages, 4 figures, accepted for publication in Physical Review Letters

## Chargeless heat transport in the fractional quantum Hall regime

Comment: Manuscript (5 pages, 3 figures) and supplementary material (8 pages, 9 figures); v2 includes additional supplementary material and references; to be published in Phys. Rev. Lett

## Direct measurement of the coherence length of edge states in the Integer Quantum Hall Regime

Comment: 4 pages, 4 figures

## Noise dephasing in the edge states of the Integer Quantum Hall regime

Comment: ~4 pages, 4 figures

## Magnetoresistance of antidot lattices with grain boundaries

Comment: 6 pages, 3 figures

## Magnetic field anti-symmetry of photovoltaic voltage in evanescent microwave fields

A two dimensional electron system without spatial inversion symmetry develops a sample specific dc voltage when exposed to a microwave radiation at low temperature. We investigate this photovoltaic (PV) effect, in the case where spatial symmetry is broken by an evanescent high-frequency potential. We measure the induced PV voltage in a ${\rm GaAs/Ga_{1-x}Al_{x}As}$ Hall bar at magnetic fields in the Tesla range. We find that in this regime the induced PV voltage is anti-symmetric with magnetic field, and exhibits regular Shubnikov-de Haas like oscillations. Our experimental results can be understood from a simple model, which describes the effect of stationary orbital currents caused by microwave driving.

## Non-Equilibrium Edge Channel Spectroscopy in the Integer Quantum Hall Regime

Comment: 13 pages including supplementary information, Nature Physics in print

## Interplay among spin, orbital effects and localization in a GaAs two-dimensional electron gas in a strong in-plane magnetic field

Comment: Published in the Physical Review B

## Energy Relaxation in the Integer Quantum Hall Regime

Comment: To be published in PRL, 10 pages including supplementary material

## Tuning Energy Relaxation along Quantum Hall Channels

The chiral edge channels in the quantum Hall regime are considered ideal ballistic quantum channels, and have quantum information processing potentialities. Here, we demonstrate experimentally, at filling factor 2, the efficient tuning of the energy relaxation that limits quantum coherence and permits the return toward equilibrium. Energy relaxation along an edge channel is controllably enhanced by increasing its transmission toward a floating ohmic contact, in quantitative agreement with predictions. Moreover, by forming a closed inner edge channel loop, we freeze energy exchanges in the outer channel. This result also elucidates the inelastic mechanisms at work at filling factor 2, informing us in particular that those within the outer edge channel are negligible.
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