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Spin Dynamics in a One-Dimensional Ferromagnetic Bose Gas

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Cheianov, V. V.
Published in Physical Review Letters. 2007, vol. 99, no. 24
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.
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ZVONAREV, Mikhail, CHEIANOV, V. V., GIAMARCHI, Thierry. Spin Dynamics in a One-Dimensional Ferromagnetic Bose Gas. In: Physical Review Letters, 2007, vol. 99, n° 24. https://archive-ouverte.unige.ch/unige:36063

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Deposited on : 2014-04-28

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