Decoherence effects on 1D quasi-condensates

Friday, September 12, 2014
Euler lecture Hall
Marco Bilardello
In the last yers, several experimental works have observed decoherence effects on low dimensional ultracold atoms systems. In particular, splitting coherently a 1D quasi-condensate, and let the two obtained clouds evolve separately from each other, it's been observed a very fast thermalization-like effect (usually called prethermalization), with an exponential decrease of the coherence factor. So, the two quasi-condensates become two indipendent ultracold atom clouds. I will review these works, and I will show briefly what theoretical models describe these effects.
- Matter-wave interferometry in a double well on an atom chip, T. Schumm et al., Nature Physics 2005; - Local emergence of thermal correlations in an isolated quantum many-body system, T. Langen et al., Nature Physics 2013; - Prethermalization revealed by the relaxation dynamics of full distribution functions, D. Adu Smith et al., New Journal of Physics 2013; - Decoherence Dynamics in Low-Dimensional Cold Atom Interferometers, A. A. Burkov, M.D. Lukin, E. Demler, Phys. Rev. Lett. 2007; - Dephasing in coherently-split quasicondensates, H.-P. Stimming, N.J. Mauser, J. Schmiedmayer, I.E. Mazets, Phys. Rev. A 2011.