95 citations · 812 across the 41 of their papers we have counts for
42 papers
Tensor hierarchy from deformation quantisation
Falk Hassler, David Osten, Alex Swash
We show that a formal deformation quantisation of degree-2 differential graded symplectic (QP) manifolds gives rise to the complete classical kinematics and dynamics of NS-NS super…
-Bootstrap
Achilleas Gitsis, Falk Hassler, Luca Scala
Due to the exponential growth in the number of terms, computing -corrections to string theory's low-energy effective actions is a challenging matter. In order to fix all the co…
All-order generalized Green-Schwarz transformations
Achilleas Gitsis, Falk Hassler
Compatibility with T-duality severely constrains higher-derivative corrections to the low-energy supergravity limits of string theory. For example, it suggests that Lorentz transfo…
Consistent truncation and generalized duality based on exceptional generalized cosets
Falk Hassler, Yuho Sakatani
We present a systematic framework for constructing consistent truncations of supergravity based on exceptional generalized cosets of the form $\GS \backslash G/H$. This approach ge…
Gauged Extended Field Theory and Generalised Cartan Geometry
Falk Hassler, David Osten, Alex Swash
Cartan geometry provides a unifying algebraic construction of curvature and torsion, based on an underlying model Lie algebra -- a viewpoint that can be extended naturally to the h…
Unraveling the generalized Bergshoeff-de Roo identification
Achilleas Gitsis, Falk Hassler
We revisit duality-covariant higher-derivative corrections which arise from the generalized Bergshoeff-de Roo (gBdR) identification, a prescription that gives rise to a two paramet…
Duality covariant curvatures for the heterotic string
Falk Hassler, David Osten, Yuho Sakatani
Duality covariant curvature and torsion tensors in double field theory/generalized geometry are central in analyzing consistent truncations, generalized dualities, and related inte…
Current Algebra and Generalised Cartan Geometry
Falk Hassler, Ondrej Hulik, David Osten
This article shows that the approach to generalised curvature and torsion pioneered by Polacek and Siegel [1] is a generalisation of Cartan Geometry -- rendering latter natural fro…
Generalized Dualities for Heterotic and Type I Strings
Falk Hassler, Yuho Sakatani, Luca Scala
We define generalized dualities for heterotic and type I strings based on consistent truncations to half-maximal gauged supergravities in more than three dimensions. The latter are…
The Hierarchy of Curvatures in Exceptional Geometry
Falk Hassler, Yuho Sakatani
Despite remarkable success in describing supergravity reductions and backgrounds, generalized geometry and the closely related exceptional field theory are still lacking a fundamen…
The Magic Renormalisability of Affine Gaudin Models
Falk Hassler, Sylvain Lacroix, Benoit Vicedo
We study the renormalisation of a large class of integrable -models obtained in the framework of affine Gaudin models. They are characterised by a simple Lie algebra $\mathfrak{…
Generalized Dualities and Supergroups
Daniel Butter, Falk Hassler, Christopher N. Pope +1
Using a recently developed formulation of double field theory in superspace, the graviton, -field, gravitini, dilatini, and Ramond-Ramond bispinor are encoded in a single genera…
All maximal gauged supergravities with uplift
Falk Hassler, Yuho Sakatani
Generalised parallelisable spaces permit to uplift many maximal gauged supergravities to ten or eleven dimensions. While some of the former are explicitly known, the literature is…
Consistent Truncations and Dualities
Daniel Butter, Falk Hassler, Christopher N. Pope +1
Recent progress in generalised geometry and extended field theories suggests a deep connection between consistent truncations and dualities, which is not immediately obvious. A pri…
An Algebraic Classification of Solution Generating Techniques
Riccardo Borsato, Sibylle Driezen, Falk Hassler
We consider a two-fold problem: on the one hand, the classification of a family of solution-generating techniques in (modified) supergravity and, on the other hand, the classificat…
Double Field Theory and Pseudo-Supersymmetry
Falk Hassler, C. N. Pope, Hao-Yu Zhang
Supersymmetric bosonic backgrounds governed by first-order BPS equations, can be realised in a much broader setting by relaxing the requirement of closure of the superalgebra beyon…
RG flow of integrable -models
Falk Hassler
We compute the one- and two-loop RG flow of integrable -models with Poisson-Lie symmetry. They are characterised by a twist function with simple poles/zeros and a double po…
O(,)-covariant two-loop -functions and Poisson-Lie T-duality
Falk Hassler, Thomas B. Rochais
We show that the one- and two-loop -functions of the closed, bosonic string can be written in a manifestly O(,)-covariant form. Based on this result, we prove that 1) Pois…
-corrected Poisson-Lie T-duality
Falk Hassler, Thomas Rochais
We propose leading order -corrections to the Poisson-Lie T-duality transformation rules of the metric, -field, and dilaton. Based on Double Field Theory, whose corrections t…
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…
T-Branes, String Junctions, and 6D SCFTs
Falk Hassler, Jonathan J. Heckman, Thomas B. Rochais +2
Recent work on 6D superconformal field theories (SCFTs) has established an intricate correspondence between certain Higgs branch deformations and nilpotent orbits of flavor symmetr…
Para-Hermitian Geometries for Poisson-Lie Symmetric -models
Falk Hassler, Dieter Lust, Felix J. Rudolph
The doubled target space of the fundamental closed string is identified with its phase space and described by an almost para-Hermitian geometry. We explore this setup in the contex…
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…