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- W2079896075 startingPage "15771" @default.
- W2079896075 abstract "The $S=1$ antiferromagnetic Heisenberg chain both with and without single ion anisotropy is studied. Using the recently proposed density matrix renormalization group technique we calculate the energy gaps as well as several different correlation functions. The two gaps, $Delta_{||}, Delta_perp$, along with associated correlation lengths and velocities are determined. The numerical results are shown to be in good agreement with theoretical predictions derived from the nonlinear sigma model and a free boson model. We also study the $S=1/2$ excitations that occur at the ends of open chains; in particular we study the behavior associated with open boundary conditions, using a model of $S=1/2$ spins coupled to the free bosons." @default.
- W2079896075 created "2016-06-24" @default.
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- W2079896075 date "1994-06-01" @default.
- W2079896075 modified "2023-09-27" @default.
- W2079896075 title "Equal-time correlations in Haldane-gap antiferromagnets" @default.
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- W2079896075 doi "https://doi.org/10.1103/physrevb.49.15771" @default.
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