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A two-parameter deformation of the SU (1|1) superalgebra and the XY quantum chain in a magnetic field

✍ Scribed by Haye Hinrichsen; Vladimir Rittenberg

Book ID
113361172
Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
159 KB
Volume
275
Category
Article
ISSN
0370-2693

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Spin dynamics of the quantum XY chain an
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✍ M.E.S. Nunes; J.A. Plascak; J. Florencio πŸ“‚ Article πŸ“… 2004 πŸ› Elsevier Science 🌐 English βš– 281 KB

We investigate the Hamiltonian dynamics of two low-dimensional quantum spin systems in a random ΓΏeld, at the inΓΏnite-temperature limit: the XY chain and the two-leg XY ladder with interchain Ising interactions. We determine the longitudinal spin autocorrelation functions of the spin-1 2 XY chain and