92 citations · 221 across the 18 of their papers we have counts for
19 papers
Target-space fusion of classical topological defects
Saskia Demulder, Chuying Wang
Classical fusion of sigma-model defects is commonly approached by combining their worldsheet actions and eliminating the intermediate fields. This procedure, however, does not syst…
Stringy T-duality on the lattice and the twisted Villain model
Coraline Bacq, Alessio Caddeo, Saskia Demulder +1
We address the question of whether dualities formulated in continuum field theory can be realised exactly at finite lattice spacing, rather than only emerging in the infrared. In t…
Non-invertible circuit complexity from fusion operations
Saskia Demulder
Modern understanding of symmetry in quantum field theory includes both invertible and non-invertible operations. Motivated by this, we extend Nielsen's geometric approach to quantu…
Non-invertible Nielsen circuits and 3d Ising gravity
Saskia Demulder
We extend Nielsen's formulation of quantum circuit complexity to include intrinsically non-invertible operations. Such gates arise from fusion with topological defect operators and…
On topological defects in Chern-Simons theory
Alex S. Arvanitakis, Lewis T. Cole, Saskia Demulder +1
We construct a new class of topological surface defects in Chern-Simons theory with non-compact, non-Abelian gauge groups. These defects are characterized by isotropic subalgebras…
Navigating string theory field space with geometric flows
Saskia Demulder, Dieter Lust, Thomas Raml
The Swampland Distance Conjecture postulates the emergence of an infinite tower of massless states when approaching infinite-distance points in moduli space. However, most string b…
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,…
Topology change and non-geometry at infinite distance
Saskia Demulder, Dieter Lust, Thomas Raml
The distance conjecture diagnoses viable low-energy effective realisation of consistent theories of quantum gravity by examining their breakdown at infinite distance in their param…
Poisson-Lie T-duality defects and target space fusion
Saskia Demulder, Thomas Raml
Topological defects have long been known to encode symmetries and dualities between physical systems. In the context of string theory, defects have been intensively studied at the…
Islands and Light Gravitons in type IIB String Theory
Saskia Demulder, Alessandra Gnecchi, Ioannis Lavdas +1
We consider the setup of an evaporating black hole in AdS coupled to an external bath, embedded in type IIB string theory. We study quantum extremal islands in these backgrou…
Integrable defects and Bäcklund transformations in Yang-Baxter models
Saskia Demulder, Thomas Raml
We explore two distinct methods to introduce integrable defects in a family of integrable sigma-models known as Yang-Baxter models. The first method invokes a modified monodromy ma…
Integrable deformation of and generalised Kaehler geometry
Saskia Demulder, Falk Hassler, Giacomo Piccinini +1
We build on the results of arXiv:1912.11036 for generalised frame fields on generalised quotient spaces and study integrable deformations for . In particular we show…
Generalised Cosets
Saskia Demulder, Falk Hassler, Giacomo Piccinini +1
Recent work has shown that two-dimensional non-linear -models on group manifolds with Poisson-Lie symmetry can be understood within generalised geometry as exemplars of generali…
Quantum properties and generalised T-duality of the Yang-Baxter Wess-Zumino model
Saskia Demulder
In this short proceedings we discuss some of the results obtained in [1]. Integrable deformations enlarge the landscape and understanding of integrable models and its algebraic str…
An invitation to Poisson-Lie T-duality in Double Field Theory and its applications
Saskia Demulder, Falk Hassler, Daniel C. Thompson
Poisson-Lie (PL) T-duality has received much attention over the last five years in connection with integrable string worldsheet theories. At the level of the worldsheet, the algebr…
Doubled aspects of generalised dualities and integrable deformations
Saskia Demulder, Falk Hassler, Daniel C. Thompson
The worldsheet theories that describe Poisson-Lie T-dualisable -models on group manifolds as well as integrable , and -deformations provide examples of -mode…
Classical and Quantum Aspects of Yang-Baxter Wess-Zumino Models
Saskia Demulder, Sibylle Driezen, Alexander Sevrin +1
We investigate the integrable Yang-Baxter deformation of the 2d Principal Chiral Model with a Wess-Zumino term. For arbitrary groups, the one-loop beta functions are calculated and…
Resurgence in -deformed Principal Chiral Models
Saskia Demulder, Daniele Dorigoni, Daniel C. Thompson
We study the Principal Chiral Model (PCM) in the presence of an integrable -deformation. We put the theory on with twisted boundary conditions and…
Integrable -deformations: Squashing Coset CFTs and
Saskia Demulder, Konstantinos Sfetsos, Daniel C. Thompson
We examine integrable -deformations of coset CFTs and their analytic continuations. We provide an interpretation of the deformation as a squashing of the corresp…