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O(3) nonlinear sigma model in 1+1 dimensions with matrix product states

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Bruckmann, Falk ; Jansen, Karl ; Kühn, Stefan
License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 06 Apr 2021 14:12


We numerically study the spectral properties, the entanglement and the zero-temperature phase structure at nonvanishing chemical potential of the O(3) nonlinear sigma model. Using matrix product states, a particular kind of one-dimensional tensor network state, we show that we are able to reach the asymptotic scaling regime and to reproduce the analytical predictions for the mass gap at vanishing ...


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