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Thermal entanglement of spins in the Heisenberg model at low temperatures

Asoudeh, M ; Sharif University of Technology | 2004

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevA.70.052307
  3. Publisher: 2004
  4. Abstract:
  5. The entanglement between two spins in the ferromagnetic Heisenberg chain at low temperatures was calculated. It was shown that if a magnetic field is applied to a ferromagnetic Heisenberg chain, then pairwise entanglement develops between spins at arbitrary given states. It was also shown that the entanglement profile is a Gaussian with a characteristic length depending on the temperature and the coupling between spins only when the ground state and the one-particle states are populated. The magnetic field was shown to affect only the amplitude of the profile and not its characteristic length
  6. Keywords:
  7. Approximation theory ; Mathematical operators ; Magnetic fields ; Low temperature effects ; Integral equations ; Functions ; Boundary conditions ; Correlation methods ; Eigenvalues and eigenfunctions ; Ferromagnetism
  8. Source: Physical Review A - Atomic, Molecular, and Optical Physics ; Volume 70, Issue 5 A , 2004 , Pages 052307-1-052307-5 ; 10502947 (ISSN)
  9. URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.70.052307