Publications associated with Condensed Matter Theory
Self-consistent time-dependent harmonic approximation for the sine-Gordon model out of equilibrium
Journal of Statistical Mechanics: Theory and Experiment IOP Publishing 2019 (2019) 084012
We derive a self-consistent time-dependent harmonic approximation for the quantum sine-Gordon model out of equilibrium and apply the method to the dynamics of tunnel-coupled one-dimensional Bose gases. We determine the time evolution of experimentally relevant observables and in particular derive results for the probability distribution of subsystem phase fluctuations. We investigate the regime of validity of the approximation by applying it to the simpler case of a nonlinear harmonic oscillator, for which numerically exact results are available. We complement our self-consistent harmonic approximation by exact results at the free fermion point of the sine-Gordon model.
Show full publication list
