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arXiv · 1206.5188

Delocalization of ultracold atoms in a disordered potential due to light scattering

Boris Nowak·Jami J. Kinnunen·Murray J. Holland·Peter Schlagheck
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Abstract

We numerically study the expansion dynamics of ultracold atoms in a one-dimensional disordered potential in the presence of a weak position measurement of the atoms. We specifically consider this position measurement to be realized by a combination of an external laser and a periodic array of optical microcavities along a waveguide. The position information is acquired through the scattering of a near-resonant laser photon into a specific eigenmode of one of the cavities. The time evolution of the atomic density in the presence of this light scattering mechanism is described within a Lindblad master equation approach, which is numerically implemented using the Monte Carlo wave function technique. We find that an arbitrarily weak rate of photon emission leads to a breakdown of Anderson localization of the atoms.

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Boris Nowak, Jami J. Kinnunen, Murray J. Holland, Peter Schlagheck. 2012-06-22. Delocalization of ultracold atoms in a disordered potential due to light scattering. https://doi.org/10.1103/physreva.86.043610

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