| speaker: | Leonid Glazman Minnesota, USA |
| time: | Mo., 20.08, 14:50-15:40 |
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.