107 citations · 978 across the 30 of their papers we have counts for
33 papers
Surface defects in Super Yang-Mills: exact results and holographic bootstrap
Lorenzo Bianchi, Davide Bonomi, Maddalena Ferragatta +1
We study two-point functions of chiral primary operators in Super Yang-Mills in the presence of a half-BPS surface defect. Such a defect preserves only the diagonal…
Analytic bootstrap for the localized magnetic field
Lorenzo Bianchi, Davide Bonomi, Elia de Sabbata
We study the two-point function of local operators in the critical O(N) model in the presence of a magnetic field localized on a line. We use a recently developed conformal dispers…
Conformal dispersion relations for defects and boundaries
Lorenzo Bianchi, Davide Bonomi
We derive a dispersion relation for two-point correlation functions in defect conformal field theories. The correlator is expressed as an integral over a (single) discontinuity tha…
Shape Deformations of Charged Rényi Entropies from Holography
Stefano Baiguera, Lorenzo Bianchi, Shira Chapman +1
Charged and symmetry-resolved Rényi entropies are entanglement measures quantifying the degree of entanglement within different charge sectors of a theory with a conserved global c…
Radiation, entanglement and islands from a boundary local quench
Lorenzo Bianchi, Stefano De Angelis, Marco Meineri
We study the entanglement and the energy density of the radiation emitted after a local quench in a boundary conformal field theory. We use the operator product expansion (OPE) to…
Mellin amplitudes for 1 CFT
Lorenzo Bianchi, Gabriel Bliard, Valentina Forini +1
We define a Mellin amplitude for CFT four-point functions. Its analytical properties are inferred from physical requirements on the correlator. We discuss the analytic continua…
Monodromy Defects in Free Field Theories
Lorenzo Bianchi, Adam Chalabi, Vladimír Procházka +2
We study co-dimension two monodromy defects in theories of conformally coupled scalars and free Dirac fermions in arbitrary dimensions. We characterise this family of conformal…
Analytic bootstrap and Witten diagrams for the ABJM Wilson line as defect CFT
Lorenzo Bianchi, Gabriel Bliard, Valentina Forini +2
We study local operator insertions on 1/2-BPS line defects in ABJM theory. Specifically, we consider a class of four-point correlators in the CFT with SU superconform…
Roadmap on Wilson loops in 3d Chern-Simons-matter theories
Nadav Drukker, Diego Trancanelli, Lorenzo Bianchi +18
This is a compact review of recent results on supersymmetric Wilson loops in ABJ(M) and related theories. It aims to be a quick introduction to the state of the art in the field an…
Superconformal surfaces in four dimensions
Lorenzo Bianchi, Madalena Lemos
We study the constraints of superconformal symmetry on codimension two defects in four-dimensional superconformal field theories. We show that the one-point function of the stress…
Emitted Radiation and Geometry
Lorenzo Bianchi, Marco Billò, Francesco Galvagno +1
In conformal Super Yang-Mills theory, the energy emitted by an accelerated heavy particle is computed by the one-point function of the stress tensor operator in the…
New linearization and reweighting for simulations of string sigma-model on the lattice
Lorenzo Bianchi, Valentina Forini, Björn Leder +2
We study the discretized worldsheet of Type IIB strings in the Gubser-Klebanov-Polyakov background in a new setup, which eliminates a complex phase previously detected in the fermi…
Marginal deformations and defect anomalies
Lorenzo Bianchi
We deform a defect conformal field theory by an exactly marginal bulk operator and we consider the dependence on the marginal coupling of flat and spherical defect expectation valu…
Form factor recursion relations at loop level
Lorenzo Bianchi, Andreas Brandhuber, Rodolfo Panerai +1
We introduce a prescription to define form factor integrands at loop level in planar supersymmetric Yang-Mills theory. This relies on a periodic kinematic configura…
Dual conformal invariance for form factors
Lorenzo Bianchi, Andreas Brandhuber, Rodolfo Panerai +1
Form factors of the stress-tensor multiplet operator in supersymmetric Yang-Mills reveal surprisingly simple structures similar to those appearing in scattering amp…
Line defects and radiation in theories
Lorenzo Bianchi, Madalena Lemos, Marco Meineri
We study the conformal data of a generic superconformal half-BPS line defect in a four-dimensional theory. We prove a theory independent relation between the one-…
Exact Bremsstrahlung functions in ABJM theory
Lorenzo Bianchi, Michelangelo Preti, Edoardo Vescovi
In this paper we study the Bremsstrahlung functions for the 1/6 BPS and the 1/2 BPS Wilson lines in ABJM theory. First we use a superconformal defect approach to prove a conjecture…
Wilson lines as superconformal defects in ABJM theory: a formula for the emitted radiation
Lorenzo Bianchi, Luca Griguolo, Michelangelo Preti +1
We study operator insertions into 1/2 BPS Wilson loops in N = 6 ABJM theory and investigate their two-point correlators. In this framework, the energy emitted by a heavy moving pro…
Strings on the lattice and AdS/CFT
Valentina Forini, Lorenzo Bianchi, Bjoern Leder +2
We present a new auxiliary field representation for the four-fermi term of the gauge-fixed Green-Schwarz superstring action which describes fluctuations around the null-cusp backgr…
Shape Dependence of Holographic Rényi Entropy in General Dimensions
Lorenzo Bianchi, Shira Chapman, Xi Dong +3
We present a holographic method for computing the response of Rényi entropies in conformal field theories to small shape deformations around a flat (or spherical) entangling surfac…
Green-Schwarz superstring on the lattice
Lorenzo Bianchi, Marco S. Bianchi, Valentina Forini +2
We consider possible discretizations for a gauge-fixed Green-Schwarz action of Type IIB superstring. We use them for measuring the action, from which we extract the cusp anomalous…
Perturbation theory for string sigma models
Lorenzo Bianchi
In this thesis we investigate quantum aspects of the Green-Schwarz superstring in various AdS backgrounds relevant for the AdS/CFT correspondence, providing several examples of per…
Lattice and string worldsheet in AdS/CFT: a numerical study
Valentina Forini, Lorenzo Bianchi, Marco S. Bianchi +2
We consider a possible discretization for the gauge-fixed Green-Schwarz (two-dimensional) sigma-model action for the Type IIB superstring and use it for measuring the cusp anomalou…
On the scattering of gluons in the GKP string
Lorenzo Bianchi, Marco S. Bianchi
We compute the one-loop S-matrix for the light bosonic excitations of the GKP string at strong coupling. These correspond, on the gauge theory side, to gluon insertions in the GKP…