Results 71 to 80 of about 1,164 (183)
The DNA of Calabi–Yau Hypersurfaces
Fortschritte der Physik, Volume 74, Issue 2, February 2026.Abstract Genetic Algorithms are implemented for triangulations of four‐dimensional reflexive polytopes, which induce Calabi–Yau threefold hypersurfaces via Batyrev's construction. These algorithms are shown to efficiently optimize physical observables such as axion decay constants or axion–photon couplings in string theory compactifications.
Nate MacFadden +2 more
wiley +1 more source
Towards (3+1) gravity through Drinfel'd doubles with cosmological constant
Physics Letters B, 2015 We present the generalisation to (3+1) dimensions of a quantum deformation of the (2+1) (Anti)-de Sitter and Poincaré Lie algebras that is compatible with the conditions imposed by the Chern–Simons formulation of (2+1) gravity.
Angel Ballesteros +2 more
doaj +1 more source
Rigidity of anti‐de Sitter (2+1)‐spacetimes with convex boundary near the Fuchsian locus
Journal of the London Mathematical Society, Volume 113, Issue 2, February 2026.Abstract We prove that globally hyperbolic compact anti‐de Sitter (2+1)‐spacetimes with a strictly convex spacelike boundary that is either smooth or polyhedral and whose holonomy is close to Fuchsian are determined by the induced metric on the boundary.
Roman Prosanov, Jean‐Marc Schlenker
wiley +1 more source
Phase transitions and geothermodynamics of black holes in dRGT massive gravity
European Physical Journal C: Particles and Fields, 2019 In this paper, we study the thermodynamics and geothermodynamics of spherical black hole solutions in dRGT massive gravity in a new extended phase space. Inspire by the work of Kastor et al.
M. Chabab +3 more
doaj +1 more source
Fully Integrated Silicone Electromagnetic Actuators for Untethered and Bio‐Inspired Soft Robotics
Advanced Intelligent Systems, Volume 8, Issue 1, January 2026.GA: A new class of soft electromagnetic actuators, with embedded coils and magnets, is here presented to enhance portability and usability outside structured environments. These actuators, fabricated through a custom additive manufacturing‐assisted process, offer high responsiveness, energy efficiency, and stretchability.
Antonio Pavone +4 more
wiley +1 more source
A Lorentz-Covariant Connection for Canonical Gravity
Symmetry, Integrability and Geometry: Methods and Applications, 2011 We construct a Lorentz-covariant connection in the context of first order canonical gravity with non-vanishing Barbero-Immirzi parameter. To do so, we start with the phase space formulation derived from the canonical analysis of the Holst action in which
Marc Geiller +3 more
doaj +1 more source
Spherically symmetric canonical quantum gravity
Physical Review D, 2015 Canonical quantization of spherically symmetric space-times is carried out, using real-valued densitized triads and extrinsic curvature components, with specific factor ordering choices ensuring in an anomaly free quantum constraint algebra. Comparison with previous work [1] reveals that the resulting physical Hilbert space has the same form, although ...
openaire +3 more sources
Relational Observables in Gravity: a Review
Symmetry, Integrability and Geometry: Methods and Applications, 2012 We present an overview on relational observables in gravity mainly from a loop quantum gravity perspective. The gauge group of general relativity is the diffeomorphism group of the underlying manifold.
Johannes Tambornino
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The Holst spin foam model via cubulations
New Journal of Physics, 2012 Spin foam models are an attempt at a covariant or path integral formulation of canonical loop quantum gravity. The construction of such models usually relies on the Plebanski formulation of general relativity as a constrained BF theory and is based on ...
Aristide Baratin +2 more
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Asymptotic safety and canonical quantum gravity
International Journal of Modern Physics AIn the context of gravity the Lagrangian and Hamiltonian formalisms have been developed largely independently, emphasizing renormalization and quantization, respectively. The formalisms use a different methodology to distinguish between gauge and physical degrees of freedom.
openaire +2 more sources