2020/09/30 by Kasia Budzik, Miroslav Rapčák, Miroslav Rapcak +1
Mathematics · Physics and Astronomy · #Algebraic structures and combinatorial models #Black Holes and Theoretical Physics #Boundary conformal field theory #Boundary value problem #Conformal anomaly #Conformal field theory #Conformal map #Conformal symmetry #Extremal length #Minimal models #Quantum many-body systems #String cosmology #String field theory #hep-th
paper · pdf · doi:10.1007/jhep01(2021)120
published as JHEP 01 (2021) 120 · 37 pages, 8 figures, 6 tables, v2: minor typos corrected
openalex created_date 2020/09/21 · openalex publication_date 2021/01/20 · arxiv created 2021/01/24 · arxiv updated 2021/01/26 · openalex updated_date 2026/08/06
A bstract Unlike conformal boundary conditions, conformal defects of Virasoro minimal models lack classification. Alternatively to the defect perturbation theory and the truncated conformal space approach, we employ open string field theory (OSFT) techniques to explore the space of conformal defects. We illustrate the method by an analysis of OSFT around the background associated to the (1 , 2) topological defect in diagonal unitary minimal models. Numerical analysis of OSFT equations of motion leads to an identification of a nice family of solutions, recovering the picture of infrared fixed points due to Kormos, Runkel and Watts. In particular, we find a continuum of solutions in the Ising model case and 6 solutions for other minimal models. OSFT provides us with numerical estimates of the g -function and other coefficients of the boundary state.