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Pairwise quantum correlations in the ground state of a N-spins antiferromagnetic chain described by the Heisenberg model with nearest neighbor exchange coupling are investigated. By varying a single coupling between two neighboring sites it is possib
Externí odkaz:
http://arxiv.org/abs/1305.5818
Autor:
Wells Jr., P. R., Koiller, Belita
We investigate pairwise correlation properties of the ground state (GS) of finite antiferromagnetic (AFM) spin chains described by the Heisenberg model. The exchange coupling is restricted to nearest neighbor spins, and is constant $J_0$ except for a
Externí odkaz:
http://arxiv.org/abs/1111.4513
Publikováno v:
Phys. Rev. B 78, 035102 (2008)
The diffusion of electronic wave packets in one-dimensional systems with on-site, binary disorder is numerically investigated within the framework of a single-band tight-binding model. Fractal properties are incorporated by assuming that the distribu
Externí odkaz:
http://arxiv.org/abs/0801.0513