Dynamical control over the confinement of spatially indirect excitons in electrostatic traps of GaAs coupled quantum wells

2017/10/30 by Mussie Beian, Suzanne Dang, Beian, Mussie +15
Physics and Astronomy · Computer Science · Chemistry · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Spectroscopy and Laser Applications

paper · pdf · doi:10.48550/arxiv.1710.10878

Abstract

We study spatially indirect excitons confined in a 10 μm wide electrostatic trap of a GaAs double quantum well. We introduce a technique to control the amplitude of the electric field interacting with the excitons electric dipole, with nanosecond precision. Our approach relies on electronic waveforms corrected for the distorsions occurring at highest frequencies so that impedance matching is not necessary. Thus, we manipulate the confinement of cold gases without inducing sizeable perturbations down to sub-Kelvin bath temperatures.

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