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We discuss in this paper the lattice discretizations of all topological defect lines (TDLs) for diagonal, minimal CFTs, using integrable restricted solid-on-solid (RSOS) models. For these CFTs, the TDLs can be labeled by the Kac labels. In…

High Energy Physics - Theory · Physics 2025-09-05 Madhav Sinha , Thiago Silva Tavares , Ananda Roy , Hubert Saleur

We consider topological defect lines (TDLs) in two-dimensional conformal field theories. Generalizing and encompassing both global symmetries and Verlinde lines, TDLs together with their attached defect operators provide models of fusion…

High Energy Physics - Theory · Physics 2019-01-30 Chi-Ming Chang , Ying-Hsuan Lin , Shu-Heng Shao , Yifan Wang , Xi Yin

Topological defect lines (TDLs) are extended line operators which act on the Hilbert space of two-dimensional CFTs and satisfy non-trivial fusion algebras when forming junctions. Among the most interesting fusion algebras are the so-called…

High Energy Physics - Theory · Physics 2025-05-20 Babak Haghighat , Youran Sun

We extend the TFT construction of CFT correlators of [arXiv:hep-th/0204148] to so-called finite logarithmic CFTs for which the algebraic input data is no longer semisimple but still finite. More specifically, starting from the data of a…

Quantum Algebra · Mathematics 2025-12-03 Aaron Hofer , Ingo Runkel

In this paper we analyze the Cardy-Lewellen equation in general diagonal model. We show that in these models it takes simple form due to some general properties of conformal field theories, like pentagon equations and OPE associativity.…

High Energy Physics - Theory · Physics 2023-04-11 Gor Sarkissian

We construct Cardy states, defect lines and chiral operators for rational coset conformal field theories on the lattice. The bulk theory is obtained by taking the overlap between tensor network representations of different string-nets,…

Statistical Mechanics · Physics 2019-07-05 Laurens Lootens , Robijn Vanhove , Frank Verstraete

Topological defect lines (TDLs) in two-dimensional conformal field theories (CFTs) are standard examples of generalized symmetries in quantum field theory. Integrable lattice incarnations of these TDLs, such as those provided by…

High Energy Physics - Theory · Physics 2024-08-16 Thiago Silva Tavares , Madhav Sinha , Linnea Grans-Samuelsson , Ananda Roy , Hubert Saleur

Topological/perfectly-transmissive defects play a fundamental role in the analysis of the symmetries of two dimensional conformal field theories (CFTs). In the present work, spin chain regularizations for these defects are proposed and…

High Energy Physics - Theory · Physics 2023-10-31 Madhav Sinha , Fei Yan , Linnea Grans-Samuelsson , Ananda Roy , Hubert Saleur

A topological defect network (TDN) is formed by a network of topological defects embedded within a topological quantum field theory (TQFT). TDNs were introduced recently for the purpose of describing fracton topological phases of matter…

Strongly Correlated Electrons · Physics 2023-01-18 Zijian Song , Arpit Dua , Wilbur Shirley , Dominic J. Williamson

We show how conformal field theory topological defects can relate solutions of open string field theory for different boundary conditions. To this end we generalize the results of Graham and Watts to include the action of defects on…

High Energy Physics - Theory · Physics 2016-12-08 Toshiko Kojita , Carlo Maccaferri , Toru Masuda , Martin Schnabl

To date, computational methods for modeling defects (vacancies, adsorbates, etc.) rely on periodic supercells in which the defect is far enough from its repeated image such that they can be assumed non-interacting. Yet, the relative…

We construct a (1+1)$d$ topological field theory (TFT) whose topological defect lines (TDLs) realize the transparent Haagerup $\mathcal{H}_3$ fusion category. This TFT has six vacua, and each of the three non-invertible simple TDLs hosts…

High Energy Physics - Theory · Physics 2022-05-04 Tzu-Chen Huang , Ying-Hsuan Lin

We introduce a many-body topological invariant, called the topological disorder parameter (TDP), to characterize gapped quantum phases with global internal symmetry in (2+1)d. TDP is defined as the constant correction that appears in the…

Strongly Correlated Electrons · Physics 2022-09-15 Bin-Bin Chen , Hong-Hao Tu , Zi Yang Meng , Meng Cheng

Congenital heart disease (CHD) encompasses a spectrum of cardiovascular structural abnormalities, often requiring customized treatment plans for individual patients. Computational modeling and analysis of these unique cardiac anatomies can…

Tissues and Organs · Quantitative Biology 2023-11-09 Fanwei Kong , Sascha Stocker , Perry S. Choi , Michael Ma , Daniel B. Ennis , Alison Marsden

Trivially-acting symmetries in two-dimensional conformal field theory include twist fields of dimension zero which are local topological operators. We investigate the consequences of regarding these operators as part of the global symmetry…

High Energy Physics - Theory · Physics 2023-11-30 Daniel Robbins , Eric Sharpe , Thomas Vandermeulen

We deal with the presence of topological defects in models for two real scalar fields. We comment on defects hosting topological defects, and we search for explicit defect solutions using the trial orbit method. As we know, under certain…

High Energy Physics - Theory · Physics 2009-11-07 D. Bazeia , W. Freire , L. Losano , R. F. Ribeiro

We examine crossing probabilities and free energies for conformally invariant critical 2-D systems in rectangular geometries, derived via conformal field theory and Stochastic L\"owner Evolution methods. These quantities are shown to…

Mathematical Physics · Physics 2016-09-07 Peter Kleban , Don Zagier

We study topological defect lines in two-dimensional rational conformal field theory. Continuous variation of the location of such a defect does not change the value of a correlator. Defects separating different phases of local CFTs with…

High Energy Physics - Theory · Physics 2008-11-26 Jürg Fröhlich , Jürgen Fuchs , Ingo Runkel , Christoph Schweigert

We construct topological defects in the Liouville field theory producing jump in the value of cosmological constant. We construct them using the Cardy-Lewellen equation for the two-point function with defect. We show that there are…

High Energy Physics - Theory · Physics 2023-04-11 Elena Apresyan , Gor Sarkissian

The study of topological semimetals has been extended to more general topological nodal systems such as metamaterials and artificial periodic structures. Among various nodal structures, triply degenerate nodal line (TNL) is rare and hence…

Materials Science · Physics 2023-08-23 Yi-Ru Wang , Gui-Bin Liu
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