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Spin dynamics in a one-dimensional ferromagnetic Bose ga | | M. B. Zvonarev
; V. V. Cheianov
; T. Giamarchi
; | | Date: |
27 Aug 2007 | | Abstract: | We investigate the propagation of spin excitations in a one-dimensional (1D)
ferromagnetic Bose gas. While the spectrum of longitudinal spin waves in this
system is sound-like, the dispersion of transverse spin excitations is
quadratic making a direct application of the Luttinger Liquid (LL) 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. | | Source: | arXiv, 0708.3638 | | Services: | Forum | Review | PDF | Favorites | |
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