Abstract
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.
Original language | English (US) |
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Article number | 110405 |
Journal | Physical review letters |
Volume | 99 |
Issue number | 11 |
DOIs | |
State | Published - Sep 14 2007 |