Dynamics of excitations in a one-dimensional bose liquid.
We show that the dynamic structure factor of a one-dimensional Bose liquid has a power-law singularity defining the main mode of collective excitations. Using the Lieb-Liniger model, we evaluate the corresponding exponent as a function of the wave vector and the interaction strength.
Khodas
M
M
William I. Fine Theoretical Physics Institute and School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Pustilnik
M
M
Kamenev
A
A
Glazman
L I
LI