Results 161 to 170 of about 166,290,583 (305)
Advanced Intelligent Systems, EarlyView.Origami turns a single silicone chamber into three different soft fluidic actuators. Crease angles alone decide whether it elongates, bends, or twists, and the fully folded chambers are cast monolithically in one day. Below 15 kPa, they reach 268% axial stretch, 72° bending, and 55° twist—no strain‐limiting layers, no rigid reinforcements, no vacuum ...
Alexia Le Gall +4 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
Emergent time and more from wavefunction collapse in general relativity
Journal of High Energy PhysicsIn this paper, we further develop a recently proposed theory of time based on wavefunction collapse in general relativity. It is based on the postulations that quantum states, which violate the momentum and Hamiltonian constraints, represent instances of
Sung-Sik Lee
doaj +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
The cosmological impact of Brane-Chern-Simons massive gravity
Journal of High Energy PhysicsIn this paper, we present a novel extension of massive gravity theory; the Brane-Chern-Simons massive gravity theory. We explore the cosmological implications of this theory by deriving the background equations and demonstrating the existence of self ...
S. Kazempour, A. R. Akbarieh
doaj +1 more source
Early universe in quantum gravity
Journal of High Energy PhysicsWe present a new picture of the early universe in finite nonlocal quantum gravity, which is Weyl invariant at the classical and quantum levels. The high-energy regime of the theory consists of two phases, a Weyl invariant trans-Planckian phase and a post-
Leonardo Modesto, Gianluca Calcagni
doaj +1 more source
Canonical “Loop” Quantum Gravity and Spin Foam Models [PDF]
, 2000 The canonical ``loop'' formulation of quantum gravity is a mathematically well defined, background independent, non perturbative standard quantization of Einstein's theory of General Relativity. Some among the most meaningful results of the theory are: 1) the complete calculation of the spectrum of geometric quantities like the area and the volume and ...
openaire +3 more sources
String Theory – Nomological Unification and the Epicycles of the Quantum Field Theory Paradigm [PDF]
, 2011 String Theory is the result of the conjunction of three conceptually independent elements: (i) the metaphysical idea of a nomological unity of the forces, (ii) the model-theoretical paradigm of Quantum Field Theory, and (iii) the conflict resulting from ...
Hedrich, Reiner
core
Analogue gravity models from conformal rescaling
, 2017 Analogue gravity is based on a mathematical identity between quantum field theory in curved space-time and the propagation of perturbations in certain condensed matter systems. But not every curved space-time can be simulated in such a way.
Sabine Hossenfelder +3 more
core +1 more source
Advanced Physics Research, EarlyView.The schematic diagram shows the flow configuration of the model. The swirling flow of shear‐thinning materials is significantly investigated under the influence of mixed convection. In addition, heat and mass transfer flow characteristics along with gyrotactic microorganisms is also investigated. ABSTRACT Thermal conductivity, temperature gradient, and
Latif Ahmad +3 more
wiley +1 more source