Spin dynamics and quantum transport in quantum spin chains under an oscillating field

K. Kudo, T. S. Monteiro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Quantum spin-chains subjected to external oscillating fields exhibit a wide range of dynamical behavior depending on the strength and frequency of the field. We investigate here the particular case of a Heisenberg model with a single spin flip; this maps onto a tight-binding model with an oscillating field, which, in turn, is equivalent to a driven-Harper model with sinusoidal time-driving. The Harper models can be mapped to image classical phasespaces. We find that peculiar structures called "shearless tori" feature very prominently in the classical phase space of the driven-Harper model. We show that quantum-spin wave packets initially located on a "shearless torus" can travel for a quite long time without broadening. The behavior has potential applications as it may provide a mechanism for non-dispersive transfer of quantum information.

Original languageEnglish
Title of host publicationComplex Phenomena in Nanoscale Systems
PublisherSpringer Verlag
Pages253-258
Number of pages6
ISBN (Print)9789048131181
DOIs
Publication statusPublished - 2009
Externally publishedYes

Publication series

NameNATO Science for Peace and Security Series B: Physics and Biophysics
ISSN (Print)1874-6500

Keywords

  • Quantum information
  • Quantum spin chains
  • Shearless torus

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

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