Thermal concurrence mixing in a one-dimensional Ising model

D. Gunlycke, V.M. Kendon, V. Vedral, S. Bose

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Abstract

The natural thermal entanglement in an Ising ring in an external magnetic field was studied. The interactions of two qubits via the Ising interaction in a magnetic field orthogonal to the z direction was analyzed. A theorem for the concurrence mixing due to occupation of the ground and the excited state was formulated. The variation of entanglement with the orientation of magnetic field was numerically considered.
Original languageEnglish
Article number042302
Number of pages7
JournalPhysical Review A
Volume64
Issue number4
DOIs
Publication statusPublished - 6 Sep 2001

Keywords

  • Hamiltonians
  • magnetic field effects
  • mathematical models
  • matrix algebra
  • phase transitions
  • theorem proving
  • thermal effects
  • thermoanalysis
  • quantum Ising model
  • thermal concurrence mixing
  • thermal entanglement
  • quantum theory

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