Matches in SemOpenAlex for { <https://semopenalex.org/work/W2941275318> ?p ?o ?g. }
- W2941275318 abstract "We discuss the polarization amplitude of quantum spin systems in one dimension. In particular, we closely investigate it in gapless phases of those systems based on the two-dimensional conformal field theory. The polarization amplitude is defined as the ground-state average of a twist operator which induces a large gauge transformation attaching the unit amount of the U(1) flux to the system. We show that the polarization amplitude under the periodic boundary condition is sensitive to perturbations around the fixed point of the renormalization-group flow rather than the fixed point itself even when the perturbation is irrelevant. This dependence is encoded into the scaling law with respect to the system size. In this paper, we show how and why the scaling law of the polarization amplitude encodes the information of the renormalization-group flow. In addition, we show that the polarization amplitude under the antiperiodic boundary condition is determined fully by the fixed point in contrast to that under the periodic one and that it visualizes clearly the nontriviality of spin systems in the sense of the Lieb-Schultz-Mattis theorem." @default.
- W2941275318 created "2019-05-03" @default.
- W2941275318 creator A5007895096 @default.
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- W2941275318 date "2019-04-29" @default.
- W2941275318 modified "2023-09-23" @default.
- W2941275318 title "Polarization amplitude near quantum critical points" @default.
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- W2941275318 doi "https://doi.org/10.1103/physrevb.99.144426" @default.
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