Results 81 to 90 of about 2,307 (223)
Relational dynamics and Page-Wootters formalism in group field theory [PDF]
QuantumGroup field theory posits that spacetime is emergent and is hence defined without any background notion of space or time; dynamical questions are formulated in relational terms, in particular using (scalar) matter degrees of freedom as time.
Andrea Calcinari, Steffen Gielen
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, 2012 Philosophers of physics and physicists have long been intrigued by the analogies and disanalogies between gravitational theories and (Yang-Mills-type) gauge theories.
Teh, Nicholas
core
Bekenstein Bound and Non-Commutative Canonical Variables
, 2022 A universal upper limit on the entropy contained in a localized quantum system of a given size and total energy is expressed by the so-called Bekenstein bound. In a previous paper [Buoninfante, L. et al.
Fabio Scardigli
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Journal of High Energy PhysicsWe 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
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The Space of Connections as the Arena for (Quantum) Gravity
Symmetry, 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
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Impact of Isolation Techniques on the Content of Small Extracellular Vesicles
Journal of Extracellular Vesicles, Volume 15, Issue 6, June 2026.ABSTRACT An important topic of discussion amongst the extracellular vesicle (EV) research field is which genetic materials are considered true constituents of EV cargo. What were once regarded as non‐EV components have now evolved to be potentially essential to EV composition, serving as key mediators in communication.
Yue Su +7 more
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, 2013 How should one understand the implications of general covariance for the role of time in classical theories of gravity? On one popular view, the essential lesson is that change is relational in a strong sense, such that all it is for a physical degree of
Thebault, Karim P Y, Gryb, Sean
core
A covariant polymerized scalar field in loop quantum gravity
, 2022 We propose a new polymerization scheme for scalar fields coupled to gravity. It has the advantage of being a (non-bijective) canonical transformation of the fields and therefore ensures the covariance of the theory.
Gambini, Rodolfo +7 more
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Quantum-Wave Equation and Heisenberg Inequalities of Covariant Quantum Gravity
Entropy, 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
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Background Instability of Quintessence Model in Light of Entropy and Distance Conjecture
Fortschritte der Physik, Volume 74, Issue 6, June 2026.ABSTRACT We apply the covariant entropy bound argument supporting the de Sitter swampland conjecture to the quintessence model, to find out the condition for the background to be unstable. More concretely, the background is unstable when the matter entropy given by the species number of the effective field theory increases more rapidly than the ...
Min‐Seok Seo
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