Dynamics of entaglement for one-dimensional spin system in an external time-dependent magnetic field

Zhen Huang, Sabre Kais

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We study the dynamics of entanglement for the XY-model, one-dimensional spin systems coupled through the nearest neighbor exchange interaction and subject to an external time-dependent magnetic field. Using the two-site density matrix, we calculate the time-dependent entanglement of formation between nearest neighbor qubits. We investigate the effect of varying the temperature, the anisotropy parameter and the external time-dependent magnetic field on the entanglement. We have found that the entanglement can be localized between nearest neighbor qubits for certain values of the external time-dependent magnetic field. Moreover, as known for the magnetization of this model, the entanglement shows nonergodic behavior, it does not approach its equilibrium value at the infinite time limit.

Original languageEnglish
Pages (from-to)483-500
Number of pages18
JournalInternational Journal of Quantum Information
Volume3
Issue number3
DOIs
Publication statusPublished - 1 Sep 2005

Keywords

  • Entanglement
  • Magnetic field
  • Spin system
  • Time-dependent calculations
  • XY-model

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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