Results 131 to 140 of about 2,706,843 (321)
Spin foam models with finite groups [PDF]
arXiv, 2011 Spin foam models, loop quantum gravity and group field theory are discussed as quantum gravity candidate theories and usually involve a continuous Lie group. We advocate here to consider quantum gravity inspired models with finite groups, firstly as a test bed for the full theory and secondly as a class of new lattice theories possibly featuring an ...
arxiv
Quantum Gravity with the Standard Model
, 2002 A unified theory of four-dimensional gravity together with the standard model is presented, with supersymmetry breaking of M-theory at a TeV. Masses of the the known particles are derived. The cosmological constant is quantum generated to the observed value. Quantum corrections to the classical compactification are analyzed, and the scenario is stable.
openaire +2 more sources
Boundary loop models and 2D quantum gravity [PDF]
Journal of Statistical Mechanics: Theory and Experiment, 2007 We study the O(n) loop model on a dynamically triangulated disk, with a new type of boundary conditions, discovered recently by Jacobsen and Saleur. The partition function of the model is that of a gas of self and mutually avoiding loops covering the disk.
openaire +4 more sources
Rapid and Reversible Morphing to Enable Multifunctionality in Robots
Advanced Intelligent Systems, EarlyView.This article introduces a rapid, reversible, and repeatable morphing robot through a bistable latch‐mediated, spring actuated (LaMSA) mechanism. This enables an untethered, multifunctional robot to near‐instantaneously (< 50 ms) and reversibly switch between a flying and driving configuration to navigate through different environments.
Brittan T. Wilcox +2 more
wiley +1 more source
Spontaneous collapse models lead to the emergence of classicality of the Universe
Journal of High Energy PhysicsAssuming that Quantum Mechanics is universal and that it can be applied over all scales, then the Universe is allowed to be in a quantum superposition of states, where each of them can correspond to a different space-time geometry.
José Luis Gaona-Reyes +3 more
doaj +1 more source
ON THE AREA OPERATORS OF THE HUSAIN–KUCHAŘ–ROVELLI MODEL AND CANONICAL/LOOP QUANTUM GRAVITY [PDF]
, 1998 Giovanni Amelino-Camelia
openalex +1 more source
Model Categories and Quantum Gravity
, 2008 We propose a mathematically concrete way of modelling the suggestion that in quantum gravity the spacetime disappears, replacing it with a discrete approximation to the causal path space described as an object in a model category. One of the versions of our models appears as a thickening of spacetime, which we interpret as a formulation of relational ...
openaire +2 more sources
Phenomenology of low quantum gravity scale models [PDF]
Physical Review D, 1999 We study some phenomenological implications of models where the scale of quantum gravity effects lies much below the four-dimensional Planck scale. These models arise from M-theory vacua where either the internal space volume is large or the string coupling is very small.
openaire +3 more sources
Multistable Composite Laminate Grids as a Design Tool for Soft Reconfigurable Multirotors
Advanced Intelligent Systems, EarlyView.Flexible, lightweight, stable: the reconfigurable multirotor combines stable flight in multiple shapes with low‐energy reconfiguration. Utilizing optimized multistable composites, it achieves self‐locking in open and folded configurations, cutting width‐span by 48% and allowing for safe gap traversal.
Luca Girardi +4 more
wiley +1 more source
Testing quantum gravity with primordial gravitational waves
Journal of High Energy PhysicsWe propose a testable alternative to inflation directly built in a very general class of ultraviolet complete theories of quantum gravity enjoying Weyl invariance.
Gianluca Calcagni, Leonardo Modesto
doaj +1 more source