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Critical loop models are exactly solvable
by Rongvoram Nivesvivat, Sylvain Ribault, Jesper Lykke Jacobsen
Submission summary
| Authors (as registered SciPost users): | Rongvoram Nivesvivat |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2311.17558v2 (pdf) |
| Code repository: | https://gitlab.com/s.g.ribault/Bootstrap_Virasoro |
| Data repository: | https://gitlab.com/s.g.ribault/Bootstrap_Virasoro |
| Date submitted: | 2024-04-05 09:42 |
| Submitted by: | Nivesvivat, Rongvoram |
| Submitted to: | SciPost Physics |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
In two-dimensional critical loop models, including the $O(n)$ and Potts models, the spectrum is exactly known, as are a few structure constants or ratios thereof. Using numerical conformal bootstrap methods, we study $235$ of the simplest 4-point structure constants. For each structure constant, we find an analytic expression as a product of two factors: 1) a universal function of conformal dimensions, built from Barnes' double Gamma function, and 2) a polynomial function of loop weights, whose degree obeys a simple upper bound. We conjecture that all structure constants are of this form. For a few 4-point functions, we build corresponding observables in a lattice loop model. From numerical lattice results, we extract amplitude ratios that depend neither on the lattice size nor on the lattice coupling. These ratios agree with the corresponding ratios of 4-point structure constants.