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28 March 2024
 
  » arxiv » arxiv.0704.2898

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Green's function of a finite chain and the discrete Fourier transform
S. Cojocaru ;
Date 22 Apr 2007
Journal International Journal of Modern Physics B Vol. 20, No. 5 (2006) 593-605
Subject Mathematical Physics (math-ph)
AbstractA new expression for the Green’s function of a finite one-dimensional lattice with nearest neighbor interaction is derived via discrete Fourier transform. Solution of the Heisenberg spin chain with periodic and open boundary conditions is considered as an example. Comparison to Bethe ansatz clarifies the relation between the two approaches.
Source arXiv, arxiv.0704.2898
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