Results 61 to 70 of about 66,341 (212)

Decoherence of quantum superpositions in near-extremal Reissner-Nordström black holes with quantum gravity corrections

open access: yesJournal of High Energy Physics
We study the quantum gravity corrected decoherence of quantum superpositions in the near-extremal Reissner-Nordström black holes. By employing the effective field theory approach, we model the black hole as a quantum system coupled to an external source ...
Ran Li, Zhong-Xiao Man, Jin Wang
doaj   +1 more source

The Space of Connections as the Arena for (Quantum) Gravity

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2011
We review some properties of the space of connections as the natural arena for canonical (quantum) gravity, and compare to the case of the superspace of 3-metrics.
Steffen Gielen
doaj   +1 more source

Crossing estimates for the Ising model on general s‐embeddings

open access: yesProceedings of the London Mathematical Society, Volume 131, Issue 4, October 2025.
Abstract We prove Russo–Seymour–Welsh‐type crossing estimates for the FK–Ising model on general s‐embeddings whose origami map has an asymptotic Lipschitz constant strictly smaller than 1, provided it satisfies a mild non‐degeneracy assumption. This result extends the work of Chelkak and provides a general framework to prove that the usual connection ...
Rémy Mahfouf
wiley   +1 more source

Quantum-Wave Equation and Heisenberg Inequalities of Covariant Quantum Gravity

open access: yesEntropy, 2017
Key aspects of the manifestly-covariant theory of quantum gravity (Cremaschini and Tessarotto 2015–2017) are investigated. These refer, first, to the establishment of the four-scalar, manifestly-covariant evolution quantum wave equation, denoted as ...
Claudio Cremaschini, Massimo Tessarotto
doaj   +1 more source

Quantum Cosmology

open access: yes, 2008
We give an introduction into quantum cosmology with emphasis on its conceptual parts. After a general motivation we review the formalism of canonical quantum gravity on which discussions of quantum cosmology are usually based.
Kiefer, Claus, Sandhoefer, Barbara
core   +1 more source

Harnessing Discrete Differential Geometry: A Virtual Playground for the Bilayer Soft Robots

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 9, September 2025.
A discrete differential geometry‐based framework is developed to model the mechanics of bilayer structures with asymmetric geometry and material properties. The simulations capture dynamic bending and contact interactions in soft robotic grasping, crawling, jumping, and swimming, demonstrating the framework's versatility for programmable shape morphing
Jiahao Li   +6 more
wiley   +1 more source

Loop Representations

open access: yes, 1993
The loop representation plays an important role in canonical quantum gravity because loop variables allow a natural treatment of the constraints. In these lectures we give an elementary introduction to (i) the relevant history of loops in knot theory and
A. Ashtekar   +43 more
core   +2 more sources

Relational Supersymmetry via the Dressing Field Method and Matter‐Interaction Supergeometric Framework

open access: yesAnnalen der Physik, Volume 537, Issue 9, September 2025.
Applications of the Dressing Field Method are reviewed and further expanded to the very foundations of the supersymmetric framework, where it allows to build relational supersymmetric field theory. Furthermore, a novel approach is proposed giving a unified description of fermionic matter fields and bosonic gauge fields: a Matter‐Interaction ...
Jordan François, L. Ravera
wiley   +1 more source

Learning about Quantum Gravity with a Couple of Nodes

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2012
Loop Quantum Gravity provides a natural truncation of the infinite degrees of freedom of gravity, obtained by studying the theory on a given finite graph. We review this procedure and we present the construction of the canonical theory on a simple graph,
Enrique F. Borja   +2 more
doaj   +1 more source

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