Abstract
We apply the large-charge expansion to O(N) vector models starting from first principles, focusing on the Wilson-Fisher point in three dimensions. We compute conformal dimensions at zero and finite temperature at fixed charge Q, concentrating on the regime 1 « N « Q. Our approach places the earlier effective field theory treatment on firm ground and extends its predictions.
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Alvarez-Gaume, L., Orlando, D. & Reffert, S. Large charge at large N. J. High Energ. Phys. 2019, 142 (2019). https://doi.org/10.1007/JHEP12(2019)142
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DOI: https://doi.org/10.1007/JHEP12(2019)142