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Boundary conformal field theory (BCFT) provides a universal framework for critical phenomena in the presence of boundaries. We determine BCFT data for the normal and ordinary boundary universality classes of the $1+1$-dimensional boundaries…

Strongly Correlated Electrons · Physics 2026-04-24 Jiechao Feng , Taige Wang

The Schwinger-Dyson equations for Green functions and 3-vertexes in planar approximation used 50 years ago in the earlier theory of conformal bootstrap are written in frames of the AdS/CFT correspondence. The technique of "Wightman-Witten"…

High Energy Physics - Theory · Physics 2019-05-10 Boris L. Altshuler

We develop new methods for approximating conformal blocks as positive functions times polynomials, with applications to the numerical bootstrap. We argue that to obtain accurate bootstrap bounds, conformal block approximations should…

High Energy Physics - Theory · Physics 2026-05-27 Cyuan-Han Chang , Vasiliy Dommes , Petr Kravchuk , David Poland , David Simmons-Duffin

We initiate a study of the bootstrap programme for field theories with BMS symmetry. Specifically, we look at two-dimensional field theories with BMS3 symmetry and, using highest weight representations, we construct the BMS bootstrap…

High Energy Physics - Theory · Physics 2017-07-19 Arjun Bagchi , Mirah Gary , Zodinmawia

We constrain the spectrum of two-dimensional unitary, compact conformal field theories with central charge c > 1 using modular bootstrap. Upper bounds on the gap in the dimension of primary operators of any spin, as well as in the dimension…

High Energy Physics - Theory · Physics 2016-08-23 Scott Collier , Ying-Hsuan Lin , Xi Yin

Recently, the conformal-bootstrap has been successfully used to obtain generic bounds on the spectrum and OPE coefficients of unitary conformal field theories. In practice, these bounds are obtained by assuming the existence of a scalar…

High Energy Physics - Theory · Physics 2015-06-18 Micha Berkooz , Ran Yacoby , Amir Zait

We study a single particle diffusing on a triangular lattice and interacting with a heat bath, using boundary conformal field theory (CFT) and exact integrability techniques. We derive a correspondence between the phase diagram of this…

Statistical Mechanics · Physics 2011-07-19 Ian Affleck , Masaki Oshikawa , Hubert Saleur

We derive a universal asymptotic formula for generic boundary conditions for the average value of the bulk-to-boundary and boundary Operator Product Expansion coefficients of any unitary, compact two-dimensional Boundary CFT (BCFT) with…

High Energy Physics - Theory · Physics 2022-09-07 Tokiro Numasawa , Ioannis Tsiares

We study holographic defect conformal field theories which are dual to probe branes with bottom-up methods. First we determine the embedding of codimension-1 interface branes in AdS space. Then we compute defect one and two-point functions…

High Energy Physics - Theory · Physics 2026-04-09 Georgios Linardopoulos , Chanyong Park

In this paper, we use crossing symmetry and unitarity constraints to put a lower bound on the central charge of conformal field theories in large space-time dimensions $D$. Specifically, we work with the four-point function of identical…

High Energy Physics - Theory · Physics 2023-06-07 Abhijit Gadde , Mrunmay Jagadale , Shraiyance Jain , Trakshu Sharma

Motivated by the recent work on $T\bar{T}$-type deformations of 2D CFTs, a especial class of single-trace deformations of AdS$_3$/CFT$_2$ correspondence has been investigated. From the worldsheet perspective, this corresponds to a marginal…

High Energy Physics - Theory · Physics 2020-05-20 Gaston Giribet , Matias Leoni

In this article, we demonstrate how a 3-point correlation function can capture the out-of-time-ordered features of a higher point correlation function, in the context of a conformal field theory (CFT) with a boundary, in two dimensions. Our…

High Energy Physics - Theory · Physics 2020-01-29 Suchetan Das , Bobby Ezhuthachan , Arnab Kundu

We study scalar conformal field theories whose large $N$ spectrum is fixed by the operator dimensions of either Ising model or Lee-Yang edge singularity. Using numerical bootstrap to study CFTs with $S_N\otimes Z_2$ symmetry, we find a…

High Energy Physics - Theory · Physics 2018-10-17 Junchen Rong , Ning Su

Motivated by applications to critical phenomena and open theoretical questions, we study conformal field theories with $O(m)\times O(n)$ global symmetry in $d=3$ spacetime dimensions. We use both analytic and numerical bootstrap techniques.…

High Energy Physics - Theory · Physics 2020-12-10 Johan Henriksson , Stefanos R. Kousvos , Andreas Stergiou

Classical conformal blocks naturally appear in the large central charge limit of 2D Virasoro conformal blocks. In the $AdS_{3}/CFT_{2}$ correspondence, they are related to classical bulk actions and are used to calculate entanglement…

High Energy Physics - Theory · Physics 2018-05-10 Máté Lencsés , Fábio Novaes

We study the conformal bootstrap for 4-point functions of stress tensors in parity-preserving 3d CFTs. To set up the bootstrap equations, we analyze the constraints of conformal symmetry, permutation symmetry, and conservation on the…

High Energy Physics - Theory · Physics 2018-04-04 Anatoly Dymarsky , Filip Kos , Petr Kravchuk , David Poland , David Simmons-Duffin

In this paper we study the constraints imposed by conformal invariance on extended objects a.k.a defects in a conformal field theory. We identify a particularly nice class of defects that is closed under conformal transformations.…

High Energy Physics - Theory · Physics 2016-02-23 Abhijit Gadde

We study operators with large internal charge in boundary conformal field theories (BCFTs) with internal symmetries. Using the state-operator correspondence and the existence of a macroscopic limit, we find a non-trivial relation between…

High Energy Physics - Theory · Physics 2021-11-03 Gabriel Cuomo , Márk Mezei , Avia Raviv-Moshe

We study correlation functions of spectrally-flowed vertex operators in bosonic string theory on $\text{AdS}_3\times X$ in the path integral formalism. By restricting the path integral to only include worldsheets which live near the…

High Energy Physics - Theory · Physics 2024-04-15 Bob Knighton , Vit Sriprachyakul

We analytically study the lightcone limit of the conformal bootstrap equations for 4-point functions containing global symmetry currents and the stress tensor in 3d CFTs. We show that the contribution of the stress tensor to the anomalous…

High Energy Physics - Theory · Physics 2016-04-01 Daliang Li , David Meltzer , David Poland