A5006361087- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Noncommutative and Quantum Gravity Theories
- Particle physics theoretical and experimental studies
- Nonlinear Waves and Solitons
- Algebraic structures and combinatorial models
- Quantum Chromodynamics and Particle Interactions
- Pulsars and Gravitational Waves Research
- Advanced Topics in Algebra
- Relativity and Gravitational Theory
- Quantum Mechanics and Non-Hermitian Physics
- Computational Physics and Python Applications
- Algebraic and Geometric Analysis
- Advanced Differential Geometry Research
- Advanced Mathematical Theories
- Physics of Superconductivity and Magnetism
- Geophysics and Gravity Measurements
- Advanced Mathematical Physics Problems
- Homotopy and Cohomology in Algebraic Topology
- Matrix Theory and Algorithms
- Geometric Analysis and Curvature Flows
- Astrophysical Phenomena and Observations
- History and Theory of Mathematics
- Galaxies: Formation, Evolution, Phenomena
- Quantum chaos and dynamical systems
University of Groningen
2015-2024
University of Mons
2024
International Solvay Institutes
2023
Vrije Universiteit Brussel
2023
Universidad Autónoma de Madrid
2023
Maxwell Institute for Mathematical Sciences
2023
University of Edinburgh
2023
Universitat de Barcelona
2023
KTH Royal Institute of Technology
2023
Stockholm University
2023
A particular higher-derivative extension of the Einstein-Hilbert action in three spacetime dimensions is shown to be equivalent at linearized level (unitary) Pauli-Fierz for a massive spin-2 field. more general model, which also includes ``topologically-massive'' gravity as special case, propagates two helicity states with different masses. We discuss $\mathcal{N}$-extended supergravity, and we present ``cosmological'' that admits an anti--de Sitter vacuum.
We explore the space of static solutions recently discovered three-dimensional ``new massive gravity'' (NMG), allowing for either sign Einstein-Hilbert term and a cosmological parametrized by dimensionless constant $\ensuremath{\lambda}$. For $\ensuremath{\lambda}=\ensuremath{-}1$ we find black hole asymptotic (but not isometric) to unique (anti) de Sitter [(A)dS] vacuum, including extremal holes that interpolate between this vacuum...
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about fundamental theory of nature at play in extreme gravity regime, where gravitational interaction is both strong and dynamical. In this white paper, Fundamental Physics Working Group LISA Consortium summarizes current topics physics observations GWs can be expected provide key input. We briefest reviews then delineate avenues for future research directions discuss connections between working group, other...
We review both the kinematics and dynamics of non-lorentzian theories their associated geometries. First, we introduce kinematical spacetimes symmetry algebras. Next, construct actions describing particle in some these spaces using method nonlinear realisations. explain relation with coadjoint orbit method. continue discussing three types gravity theories: Galilei gravity, Newton-Cartan Carroll gravity. Introducing matter, discuss electric magnetic field for different spins: spin-0, spin-1/2...
We discuss a generalized form of IIA/IIB supergravity depending onall R-R potentials C(p) (p = 0,1,...,9) as the effective field theory type superstring theory. For IIA case we explicitly break this democracy to either p⩽3 or p⩾5, which allows us write new bulk action that can be coupled N 1 supersymmetric brane actions.
We show how the Newton–Cartan formulation of Newtonian gravity can be obtained from gauging Bargmann algebra, i.e. centrally extended Galilean algebra. In this procedure several curvature constraints are imposed. These convert spatial (time) translational symmetries algebra into general coordinate transformations and make spin connection gauge fields dependent. addition we require two independent vielbein postulates for temporal directions. final step impose an additional constraint to...
A bstract Nonrelativistic string theory in flat spacetime is described by a two-dimensional quantum field with nonrelativistic global symmetry acting on the worldsheet fields. unitary, ultraviolet complete and has spectrum S-matrix enjoying symmetry. The of coupled to curved background Kalb-Ramond two-form dilaton field. appropriate geometry for dubbed Newton-Cartan geometry, which distinct from Riemannian geometry. This defines sigma model describing strings propagating interacting We also...
We investigate particles whose dynamics is invariant under the Carroll group. Although a single free such particle has no non-trivial (`the does not move') we show that there exists for set of interacting particles. Furthermore, gauge algebra and couple to these fields. It turns out coupled system even can have dynamics.
Nonrelativistic string theory is described by a sigma model with relativistic worldsheet and nonrelativistic target spacetime geometry, that called Newton–Cartan geometry. In this paper we obtain geometry as limit of the Riemannian general relativity fluxless two-form field. We then apply same to in curved background fields show it leads coupled Kalb–Ramond dilaton field background. Finally, use our limiting procedure study equations motion T-duality transformations theory. Our results...
Using superconformal methods we derive an explicit de Sitter supergravity action invariant under spontaneously broken local ${\cal N}=1$ supersymmetry. The multiplet interacts with a nilpotent goldstino multiplet. We present complete locally supersymmetric including the graviton and fermionic fields, gravitino goldstino, no scalars. In global limit when decouples, our reproduces Volkov-Akulov theory. unitary gauge where vanishes recover pure positive cosmological constant. classical...
We show that by gauging the Schrödinger algebra with critical exponent z and imposing suitable curvature constraints, make diffeomorphisms equivalent to time space translations, one obtains a geometric structure known as (twistless) torsional Newton-Cartan geometry (TTNC).This is version of (TNC) in which timelike vielbein τ μ must be hypersurface orthogonal.For = 2 this TTNC very closely related appearing holographic duals Lifshitz space-times based on Einstein gravity coupled massive...
We define a procedure that, starting from relativistic theory of supergravity, leads to consistent, non-relativistic version thereof. As first application we use this limiting show how the Newton-Cartan formulation gravity can be obtained general relativity. Then apply it in supersymmetric case and derive novel, non-relativistic, off-shell three-dimensional supergravity.