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Spin dynamics in a one-dimensional ferromagnetic Bose Gas.

Zvonarev, M. B. and Cheianov, Vadim V. and Giamarchi, T. (2007) Spin dynamics in a one-dimensional ferromagnetic Bose Gas. Physical Review Letters, 99 (24). p. 240404. ISSN 1079-7114

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Abstract

We investigate the propagation of spin excitations in a one-dimensional ferromagnetic Bose gas. While the spectrum of longitudinal spin waves in this system is soundlike, the dispersion of transverse spin excitations is quadratic, making a direct application of the Luttinger liquid theory impossible. By using a combination of different analytic methods we derive the large time asymptotic behavior of the spin-spin dynamical correlation function for strong interparticle repulsion. The result has an unusual structure associated with a crossover from the regime of trapped spin wave to an open regime and does not have analogues in known low-energy universality classes of quantum 1D systems.

Item Type: Article
Journal or Publication Title: Physical Review Letters
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 18676
Deposited By: ep_ss_importer
Deposited On: 29 Oct 2008 11:04
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:20
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/18676

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