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Quantum spin chains: Simple models with complex dynamics

Zeitschrift für Physik B Condensed Matter volume 68, pages 149–159 (1987)Cite this article

Abstract

The present study highlights some of the complexities observed in the dynamical properties of one-dimensional quantum spin systems. Exact results for zero-temperature dynamic correlation functions are presented for two contrasting situations:

  1. (i)

    a system with a fully ordered ferromagnetic ground state;

  2. (ii)

    a system at aT c=0 critical point.

For both situations it is found that the exact results are considerably more complex than has been anticipated on the basis of approximate approaches which are considered to be appropriate and reliable for such situations. A still higher degree of complexity is expected for the dynamics of quantum spin systems which are nonintegrable. The paper concludes with some observations concerning nonintegrability effects and quantum chaos in spin systems.

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Authors and Affiliations

  1. Department of Physics, The University of Rhode Island, 02881, Kingston, Rhode Island, USA

    G. Müller

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  1. G. Müller
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Dedicated to Professor Harry Thomas on the occasion of his 60th birthday

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Müller, G. Quantum spin chains: Simple models with complex dynamics. Z. Physik B - Condensed Matter 68, 149–159 (1987). https://doi.org/10.1007/BF01304220

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  • DOI: https://doi.org/10.1007/BF01304220

Keywords

  • Neural Network
  • Correlation Function
  • Simple Model
  • Nonlinear Dynamics
  • Dynamical Property