Phys. Rev. Lett. 105, 090404 (2010) [4 pages]Relaxation of a High-Energy Quasiparticle in a One-Dimensional Bose GasReceived 2 February 2010; published 26 August 2010 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. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.105.090404
DOI:
10.1103/PhysRevLett.105.090404
PACS:
03.75.Kk, 05.30.Jp
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