Dresden 2014 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 79: Correlated Electrons - Poster Session
TT 79.73: Poster
Wednesday, April 2, 2014, 15:00–19:00, P2
Hydrodynamic long-time tails after a quantum quench — Jonathan Lux1, •Jan Müller1, Aditi Mitra1,2, and Achim Rosch1 — 1Institut für Theoretische Physik, Universität zu Köln — 2Department of Physics, New York University
After a quantum quench, a sudden change of parameters, generic many particle quantum systems are expected to equilibrate. While a few collisions of quasi particles are usually sufficient to establish approximately local equilibrium, the eventual global equilibrium is, however, much more difficult to detect: conserved quantities have to be transported for long distances to build up a characteristic pattern of fluctuations, which takes a very long time.
Here we investigate a quantum quench of the one-dimensional bosonic Mott insulator from infinite to finite interaction strength using semiclassical methods for weak, and exact diagonalization for strong quenches. We demonstrate that equilibrium is approached only slowly, as t−1/2 with subleading corrections, consistent with predictions from hydrodynamics.