Abstract
We perform Monte-Carlo measurements of two and three-point functions of charged operators in the critical O(2) model in 3 dimensions. Our results are compatible with the predictions of the large charge superfluid effective field theory. To obtain reliable measurements for large values of the charge, we improved the Worm algorithm and devised a measurement scheme which mitigates the uncertainties due to lattice and finite size effects.
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Acknowledgments
GC is supported by the Simons Foundation (Simons Collaboration on the Non-perturbative Bootstrap) grants 488647 and 397411. JM is supported by FCT with the fellowship 2021.04743.BD, co-funded by the Programme Por_Norte, the European Social Fund (ESF), and the Portuguese state budget (MCTES). JM, JO and JV thank the cluster time provided by INCD funded by FCT and FEDER under project 01/SAICT/2016 n° 022153 and the grant 2021.09830.CPCA of the Advanced Computing Projects (2nd edition) as well as GRID FEUP. They also thank Centro de Física do Porto funded by Portuguese Foundation for Science and Technology (FCT) within the Strategic Funding UIDB/04650/2020. JP is supported by the Simons Foundation grant 488649 (Simons Collaboration on the Nonperturbative Bootstrap) and the Swiss National Science Foundation through the project 200020_197160 and through the National Centre of Competence in Research SwissMAP.
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Cuomo, G., Lopes, J.P., Matos, J. et al. Numerical tests of the large charge expansion. J. High Energ. Phys. 2024, 161 (2024). https://doi.org/10.1007/JHEP05(2024)161
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DOI: https://doi.org/10.1007/JHEP05(2024)161