Item request has been placed! ×
Item request cannot be made. ×
loading  Processing Request

Feynman diagrams and the large charge expansion in $3-\varepsilon$ dimensions

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
  • معلومة اضافية
    • Publication Date:
      2019
    • Collection:
      Condensed Matter
      High Energy Physics - Phenomenology
      High Energy Physics - Theory
    • Abstract:
      In arXiv:1909.01269 it was shown that the scaling dimension of the lightest charge $n$ operator in the $U(1)$ model at the Wilson-Fisher fixed point in $d=4-\varepsilon$ can be computed semiclassically for arbitrary values of $\lambda n$, where $\lambda$ is the perturbatively small fixed point coupling. Here we generalize this result to the fixed point of the $U(1)$ model in $3-\varepsilon$ dimensions. The result interpolates continuously between diagrammatic calculations and the universal conformal superfluid regime for CFTs at large charge. In particular it reproduces the expectedly universal $O(n^0)$ contribution to the scaling dimension of large charge operators in $3d$ CFTs.
      Comment: 7 pages, v2 typos fixed, match journal version
    • Accession Number:
      10.1016/j.physletb.2020.135202
    • Accession Number:
      edsarx.1911.08505