https://OkongOyangO.github.io/OkongOyangO.JournalClub/tags/wilson-fisher-fixed-point/Recent content in Wilson-Fisher Fixed Point on Condensed Matter🍩 + AI🤖 Journal Club🎓Hugoenyzj5306@psu.edu (Yiyang Jiang)yzj5306@psu.edu (Yiyang Jiang)Mon, 17 Aug 2026 15:30:00 -0400https://OkongOyangO.github.io/OkongOyangO.JournalClub/posts/2026-08-conformal-field-theory-introduction/Mon, 17 Aug 2026 15:30:00 -0400yzj5306@psu.edu (Yiyang Jiang)https://OkongOyangO.github.io/OkongOyangO.JournalClub/posts/2026-08-conformal-field-theory-introduction/<table> <thead> <tr> <th></th> <th></th> </tr> </thead> <tbody> <tr> <td><strong>Presenter</strong></td> <td>You-Chiuan (Andy) Chen (Prof. Ribhu Kaul&rsquo;s group, Penn State)</td> </tr> <tr> <td><strong>Date</strong></td> <td>August 17, 2026 · 5:00–6:00 PM</td> </tr> <tr> <td><strong>Location</strong></td> <td>Davey 339</td> </tr> <tr> <td><strong>Topic</strong></td> <td>An introduction to conformal field theory — Lecture I</td> </tr> </tbody> </table> <p>Lecture I of a two-part introduction to conformal field theory, told from the condensed-matter side. The organising question: a critical $\phi^4$ theory is strongly interacting and we cannot solve it — so what can symmetry alone tell us? The answer runs from the emergent scale invariance at a fixed point, through the conformal group and the correlators it fixes, to the operator product expansion and the bootstrap, where crossing symmetry plus unitarity pin the 3D Ising critical exponents to six digits without ever evaluating a path integral. A preview of radial quantization closes the session.</p>