Results 161 to 170 of about 1,925,015 (386)
BARRIERS IN QUANTUM GRAVITY [PDF]
, 1994 I discuss recent progress in our understanding of two barriers in quantum gravity: $c > 1$ in the case of 2d quantum gravity and $D > 2$ in the case of Euclidean Einstein-Hilbert gravity formulated in space-time dimensions $D >2$.
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Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai +3 more
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Expectation values of coherent states for SU(2) Lattice Gauge Theories
Journal of High Energy Physics, 2020 This article investigates properties of semiclassical Gauge Field Theory Coherent States for general quantum gauge theories. Useful, e.g., for the canonical formulation of Lattice Gauge Theories these states are labelled by a point in the classical phase
Klaus Liegener +1 more
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Quantum Gravity If Non-Locality Is Fundamental. [PDF]
Entropy (Basel), 2022 Kauffman SA.
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, 2019 The creation of matter by the structure of the basic quantum fields causes an unbalance within the scalars of the flat Higgs field. The result is Newtonian gravity, scalar vectors that act like a push force.
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Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.Magnetic soft robots offer promise in biomedicine due to their wireless actuation and rapid response, but current fabrication methods are complex and have limited cellular compatibility. A new, contactless bioassembly strategy using hydrodynamic instabilities is introduced, enabling customizable, centimeter‐scale robots.
Wei Gao +5 more
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Minimal and maximal lengths of quantum gravity from non-hermitian position-dependent noncommutativity. [PDF]
Sci Rep, 2022 Lawson LM.
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Quantum Theory of Gravity. I. The Canonicál Theory [PDF]
, 1968 Bryce S. DeWitt
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Quantum gravity is a critical area of research aiming to reconcile the principles of general relativity and quantum mechanics. While general relativity explains the gravitational forces acting on massive bodies, it lacks compatibility with quantum mechanics, which governs the behavior of subatomic particles.
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A parametrix for quantum gravity? [PDF]
International Journal of Geometric Methods in Modern Physics, 2016 In the 60s, DeWitt discovered that the advanced and retarded Green functions of the wave operator on metric perturbations in the de Donder gauge make it possible to define classical Poisson brackets on the space of functionals that are invariant under the action of the full diffeomorphism group of spacetime. He therefore tried to exploit this property
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