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- W2014269436 abstract "We study a model of spinless fermions with infinite nearest-neighbor repulsion on the square ladder, which has microscopic supersymmetry. It has been conjectured that in the continuum, the model is described by the superconformal minimal model with central charge $c=3/2$. Thus far, it has not been possible to confirm this conjecture due to strong finite-size corrections in numerical data. We trace the origin of these corrections to the presence of unusual marginal operators that break Lorentz invariance but preserve part of the supersymmetry. By relying mostly on entanglement entropy calculations with the density-matrix renormalization group, we are able to reduce finite-size effects significantly. This allows us to unambiguously determine the continuum theory of the model. We also study perturbations of the model and establish that the supersymmetric model is a multicritical point. Our work underlines the power of entanglement entropy as a probe of the phases of quantum many-body systems." @default.
- W2014269436 created "2016-06-24" @default.
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- W2014269436 date "2013-04-30" @default.
- W2014269436 modified "2023-09-27" @default.
- W2014269436 title "Supersymmetric multicritical point in a model of lattice fermions" @default.
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- W2014269436 doi "https://doi.org/10.1103/physrevb.87.165145" @default.
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