Thursday, December 20, 2007, 9:30 am — Small Seminar Room, Bldg. 510
Abstract:
We analyze the dynamical structure factor of interacting 1D Bose liquids. This quantity has become experimentally accessible in the recent experiments on cold atoms. We find power law non-analyticity in the dynamical structure factor at the kinematical absorption thresholds and power law divergence at
the Bogolubov excitation mode. Analytic results are compared with the numerical data. The special limit of strongly interacting bosons is studied using
the Bose-Fermi mapping. The numerical data is in agreement with our analytic results. We further discuss the dynamical structure factor at the kinematical
thresholds in the weak interaction limit. We argue that it can be understood by considering soliton-like solutions of the semiclassical equations of motion.
Hosted by: Alexei Tsvelik
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