A5060736524- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Noncommutative and Quantum Gravity Theories
- Nonlinear Waves and Solitons
- Algebraic structures and combinatorial models
- Homotopy and Cohomology in Algebraic Topology
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Quantum Information and Cryptography
- Geometry and complex manifolds
- Pulsars and Gravitational Waves Research
- Quantum Mechanics and Non-Hermitian Physics
- Quantum Mechanics and Applications
- Advanced Differential Geometry Research
- Nuclear physics research studies
- Quantum and electron transport phenomena
- Advanced Topics in Algebra
- Spectroscopy and Quantum Chemical Studies
- Advanced Thermodynamics and Statistical Mechanics
- Quantum optics and atomic interactions
- Quantum and Classical Electrodynamics
- Astrophysical Phenomena and Observations
- Spectral Theory in Mathematical Physics
- Magnetic confinement fusion research
- Fusion materials and technologies
King's College London
2016-2025
Culham Science Centre
2022-2024
Culham Centre for Fusion Energy
2024
United Kingdom Atomic Energy Authority
2022-2023
Aristotle University of Thessaloniki
1993-2020
Laboratoire de Physique de l'ENS
2019
Laboratoire de Physique Théorique
2019
European Organization for Nuclear Research
1991-2018
National and Kapodistrian University of Athens
2001-2018
King's College Hospital
1987-2010
We show that the maximally supersymmetric pp-waves of IIB superstring and M-theories can be obtained as a Penrose limit AdS x S solutions. In addition we find in certain large tension limit, geometry seen by brane probe an background is either Minkowski space or pp-wave.
We investigate the Penrose limits of classical string and M-theory backgrounds. prove that number (super)symmetries a supergravity background never decreases in limit. classify all possible AdS × S spacetimes brane solutions. also present various other solutions: intersecting branes, supersymmetric black holes strings diverse dimensions, cosmological models. explore limit an isometrically embedded spacetime find generalization to spaces with more than one time. Finally, we show is large...
A new class of one-dimensional non-linear sigma models with N supersymmetries is constructed by generalising the action and supersymmetry transformations these theories. The study geometry associated model manifolds reveals structures which are different from those found in two-dimensional In particular, certain N=2 defined on foliations existence an N=3 multiplet demonstrated. Conventional off-shell constrained multiplets actions given for all
The spinorial geometry method of solving Killing spinor equations is reviewed as it applies to 6-dimensional (1,0) supergravity.In particular, explained how the used identify both fractions supersymmetry preserved by and all supersymmetric backgrounds.Then two applications are described systems that exhibit superconformal symmetry.The first proof some black hole horizons locally isometric AdS 3 × Σ , where diffeomeorphic S .The second one a description solutions theories in particular their...
Abstract After the second Deuterium–Tritium Campaign (DTE2) in JET tokamak with ITER-Like Wall (ILW) and full tritium campaigns that preceded followed after DTE2, a sequence of fuel recovery methods was applied to promote removal from wall components. The started several days baking main chamber walls at 240 °C 320 °C. Subsequently, superimposed Ion-Cyclotron Conditioning (ICWC) Glow Discharge (GDC) cleaning cycles deuterium. Diverted plasma operation deuterium different strike point...
A static minimal energy configuration of a super p-brane in supersymmetric $(n+1)$-dimensional spacetime is shown to be ``generalized calibrated'' submanifold. Calibrations ${E}^{(1,n)}$ and ${\mathrm{AdS}}_{n+1}$ are special cases. We present several M-brane examples.
We investigate a string model defined by special plane-wave metric ds2 = 2du dv − λ(u)x2 du2 + dx2 with λ k/u2 and k const > 0. This is Penrose limit of some cosmological, Dp-brane fundamental backgrounds. Remarkably, in Rosen coordinates the has 'null cosmology' interpretation flat spatial sections scale factor which power light-cone time u. show that: (i) this spacetime Lorentzian homogeneous space. In particular, it admits boost isometry u' ℓu, v' ℓ−1v similar to Minkowski (ii) It an...
A class of extended supersymmetric two-dimensional non-linear sigma -models can be formulated in terms constrained superfields. The conditions for these constraints to linearisable are examined. These involve generalised Nijenhuis tensors and curvature constructed from the complex structures on target manifold. Off-shell superfields Yang-Mills sector (2, 0) (4, models. will exist provided that certain satisfied; most conveniently expressed geometry fibre bundles. existence implies general...
A bstract By adapting previously known arguments concerning Ricci flow and the c -theorem, we give a direct proof that in two-dimensional sigma-model with compact target space, scale invariance implies conformal perturbation theory. This argument, which applies to general constructed space metric B -field, is accord more literature arbitrary quantum field theories. Models extended supersymmetry -field are provide interesting test cases for relation between We examples showing such models,...