F. K. Seibold

activity

20162025

most citedSemiclassics, Goldstone Bosons and CFT data

156 citations · 318 across the 18 of their papers we have counts for

collaborators

20 papers

hep-th2025

Supersymmetry and integrability of the elliptic $AdS_{3} \times S^{3} \times T^{4}$ superstring

Ben Hoare, Fiona K. Seibold

We construct a 1-parameter family of Ramond-Ramond fluxes supporting the elliptic $AdS_{3} \times S^{3} \times T^{4}$ metric with constant dilaton and preservi…

hep-th2025

Interpolating families of integrable AdS3 backgrounds

Fiona K. Seibold, Alessandro Sfondrini

We construct families of integrable deformations that interpolate between $A d S_{3} \times S^{3} \times S^{3} \times S^{1}$ and either $A d S_{3} \times S^{3} \times S^{2} \times T^{2}$ or $AdS_3\times S^2…

hep-th2024★ 2 cited

AdS3 Integrability, Tensionless Limits, and Deformations: A Review

Fiona K. Seibold, Alessandro Sfondrini

Motivated by the recent advances in the understanding of integrability for $A d S_{3}$ backgrounds, we present a lightning review of this approach, with particular attention to the "te…

hep-th2024

Scattering on the supermembrane

Fiona K. Seibold, Arkady A. Tseytlin

We compute the one-loop $2 \to 2$ scattering amplitude of massless scalars on the world volume of an infinite $D = 11$ supermembrane quantized in the static gauge. The resu…

hep-th2024★ 1 cited

Exact approaches on the string worldsheet

Saskia Demulder, Sibylle Driezen, Bob Knighton +5

We review different exact approaches to string theory. In the context of the Green-Schwarz superstring, we discuss the action in curved backgrounds and its supercoset formulation,…

hep-th2023

Inequivalent light-cone gauge-fixings of strings on $A d S_{n} \times S^{n}$ backgrounds

Riccardo Borsato, Sibylle Driezen, Ben Hoare +2

Light-cone gauge-fixed sigma-models on $A d S_{n} \times S^{n}$ backgrounds play an important role in the integrability formulation of the AdS/CFT correspondence. The string spectrum of t…

hep-th2023

Elliptic deformations of the $AdS_{3} \times S^{3} \times T^{4}$ string

Ben Hoare, Ana L. Retore, Fiona K. Seibold

With the aim of investigating the existence of an integrable elliptic deformation of strings on $AdS_{3} \times S^{3} \times T^{4}$ , we compute the tree-level…

hep-th2023

S-matrix on effective string and compactified membrane

Fiona K. Seibold, Arkady A. Tseytlin

Expanding Nambu-Goto action near infinitely long string vacuum one can compute scattering amplitudes of 2d massless fields representing transverse string coordinates. As was shown…

hep-th2022

Bi- $η$ and bi- $λ$ deformations of $Z_{4}$ permutation supercosets

Ben Hoare, Nat Levine, Fiona K. Seibold

Integrable string sigma models on AdS $_{3}$ backgrounds with 16 supersymmetries have the distinguishing feature that their superisometry group is a direct product. As a result the de…

hep-th2022★ 17 cited

Integrable supersymmetric deformations of $Ad S_{3} \times S^{3} \times T^{4}$

Ben Hoare, Fiona K. Seibold, Arkady A. Tseytlin

We construct a family of type IIB string backgrounds that are deformations of $Ad S_{3} \times S^{3} \times T^{4}$ with a "squashed" $Ad S_{3} \times S^{3}$ metric supported by a combi…

hep-th2022

Transfer matrices for AdS3/CFT2

Fiona K. Seibold, Alessandro Sfondrini

We work out the algebraic Bethe ansatz for the worldsheet theory of the $A d S_{3} \times S^{3} \times T^{4}$ superstring, and use it to derive the transfer matrices for fundamental particle…

hep-th2021★ 4 cited

Bethe Ansatz for Quantum-Deformed Strings

Fiona K. Seibold, Alessandro Sfondrini

Two distinct $η$ -deformations of strings on AdS $_{5} \times$ S $^{5}$ can be defined; both amount to integrable quantum deformations of the string non-linear sigma model, but only one is…

hep-th2021★ 11 cited

On quantum deformations of $A d S_{3} \times S^{3} \times T^{4}$ and mirror duality

Fiona K. Seibold, Stijn J. van Tongeren, Yannik Zimmermann

We consider various integrable two-parameter deformations of the $A d S_{3} \times S^{3} \times T^{4}$ superstring with quantum group symmetry. Working on the string worldsheet in light-co…

hep-th2020★ 8 cited

S matrix for a three-parameter integrable deformation of $A d S_{3} \times S^{3}$ strings

Marco Bocconcello, Isari Masuda, Fiona K. Seibold +1

We consider the three-parameter integrable deformation of the $A d S_{3} \times S^{3}$ superstring background constructed in arXiv:1811.00453. Working on the string worldsheet in uniform…

hep-th2020★ 8 cited

The twisted story of worldsheet scattering in $η$ -deformed $A d S_{5} \times S^{5}$

Fiona K. Seibold, Stijn J. van Tongeren, Yannik Zimmermann

We study the worldsheet scattering theory of the $η$ deformation of the AdS $_{5} \times$ S $^{5}$ superstring corresponding to the purely fermionic Dynkin diagram. Thi…

hep-th2019★ 31 cited

Two-parameter integrable deformations of the $A d S_{3} \times S^{3} \times T^{4}$ superstring

Fiona K. Seibold

For supercosets with isometry group of the form $G^\times G^$ , the eta-deformation can be generalised to a two-parameter integrable deformation with independent $q$ -defo…

hep-th2018★ 54 cited

Supergravity backgrounds of the eta-deformed AdS2 x S2 x T6 and AdS5 x S5 superstrings

Ben Hoare, Fiona K. Seibold

We construct supergravity backgrounds for the integrable eta-deformations of the AdS2 x S2 x T6 and AdS5 x S5 superstring sigma models. The eta-deformation is governed by an R-matr…

hep-th2018★ 3 cited

Poisson-Lie duals of the $η$ -deformed $AdS_{2} \times S^{2} \times T^{6}$ superstring

Ben Hoare, Fiona K. Seibold

We investigate Poisson-Lie duals of the $η$ -deformed $AdS_{2} \times S^{2} \times T^{6}$ superstring. The $η$ -deformed background satisfies a generalisation of…

hep-th2017★ 23 cited

Poisson-Lie duals of the eta deformed symmetric space sigma model

Ben Hoare, Fiona K. Seibold

Poisson-Lie dualising the eta deformation of the G/H symmetric space sigma model with respect to the simple Lie group G is conjectured to give an analytic continuation of the assoc…

hep-th2016★ 156 cited

Semiclassics, Goldstone Bosons and CFT data

Alexander Monin, David Pirtskhalava, Riccardo Rattazzi +1

Hellerman et al. (arXiv:1505.01537) have shown that in a generic CFT the spectrum of operators carrying a large U(1) charge can be analyzed semiclassically in an expansion in inver…

Supersymmetry and integrability of the elliptic AdS3​×S3×T4 superstring

Interpolating families of integrable AdS3 backgrounds

AdS3 Integrability, Tensionless Limits, and Deformations: A Review

Scattering on the supermembrane

Exact approaches on the string worldsheet

Inequivalent light-cone gauge-fixings of strings on AdSn​×Sn backgrounds

Elliptic deformations of the AdS3​×S3×T4 string

S-matrix on effective string and compactified membrane

Bi-η and bi-λ deformations of Z4​ permutation supercosets

Integrable supersymmetric deformations of AdS3​×S3×T4

Transfer matrices for AdS3/CFT2

Bethe Ansatz for Quantum-Deformed Strings

On quantum deformations of AdS3​×S3×T4 and mirror duality

S matrix for a three-parameter integrable deformation of AdS3​×S3 strings

The twisted story of worldsheet scattering in η-deformed AdS5​×S5

Two-parameter integrable deformations of the AdS3​×S3×T4 superstring

Supergravity backgrounds of the eta-deformed AdS2 x S2 x T6 and AdS5 x S5 superstrings

Poisson-Lie duals of the η-deformed AdS2​×S2×T6 superstring

Poisson-Lie duals of the eta deformed symmetric space sigma model

Semiclassics, Goldstone Bosons and CFT data

Supersymmetry and integrability of the elliptic $AdS_{3} \times S^{3} \times T^{4}$ superstring

Inequivalent light-cone gauge-fixings of strings on $A d S_{n} \times S^{n}$ backgrounds

Elliptic deformations of the $AdS_{3} \times S^{3} \times T^{4}$ string

Bi- $η$ and bi- $λ$ deformations of $Z_{4}$ permutation supercosets

Integrable supersymmetric deformations of $Ad S_{3} \times S^{3} \times T^{4}$

On quantum deformations of $A d S_{3} \times S^{3} \times T^{4}$ and mirror duality

S matrix for a three-parameter integrable deformation of $A d S_{3} \times S^{3}$ strings

The twisted story of worldsheet scattering in $η$ -deformed $A d S_{5} \times S^{5}$

Two-parameter integrable deformations of the $A d S_{3} \times S^{3} \times T^{4}$ superstring

Poisson-Lie duals of the $η$ -deformed $AdS_{2} \times S^{2} \times T^{6}$ superstring