From short-time diffusive to long-time ballistic dynamics: the unusual center-of-mass motion of quantum bright solitons
arXiv:1407.7633 · doi:10.1103/PhysRevA.91.063616
Abstract
Brownian motion is ballistic on short time scales and diffusive on long time scales. Our theoretical investigations indicate that one can observe the exact opposite - an "anomaleous diffusion process" where initially diffusive motion becomes ballistic on longer time scales - in an ultracold atom system with a size comparable to macromolecules. This system is a quantum matter-wave bright soliton subject to decoherence via three-particle losses for which we investigate the center-of-mass motion. Our simulations show that such unusual center-of-mass dynamics should be observable on experimentally accessible time scales.
8 pages, 4 figures, minor revisions
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