title: Relaxation of a high-energy quasiparticle in a one-dimensional bose gas.
abstract: We evaluate the relaxation rate of high-energy quasiparticles in a weakly interacting one-dimensional Bose gas. Unlike in higher dimensions, the rate is a nonmonotonic function of temperature, with a maximum at the crossover to the state of suppressed density fluctuations. At the maximum, the relaxation rate may significantly exceed its zero-temperature value. We also find the dependence of the differential inelastic scattering rate on the transferred energy. This rate yields information about temperature dependence of local pair correlations.
authors.affiliation: Department of Physics, Yale University, New Haven, Connecticut 06520, USA.
authors.forename: Shina
authors.initials: S
authors.lastname: Tan
authors.forename: Michael
authors.initials: M
authors.lastname: Pustilnik
authors.forename: Leonid I
authors.initials: LI
authors.lastname: Glazman