Results 71 to 80 of about 49,504 (245)

Quantum de Sitter horizon entropy from quasicanonical bulk, edge, sphere and topological string partition functions

Journal of High Energy Physics, 2022
Motivated by the prospect of constraining microscopic models, we calculate the exact one-loop corrected de Sitter entropy (the logarithm of the sphere partition function) for every effective field theory of quantum gravity, with particles in arbitrary ...
Dionysios Anninos, Frederik Denef, Y. T. Albert Law, Zimo Sun   +3 more
doaj   +1 more source

Proposal for solving the "problem of time" in canonical quantum gravity. [PDF]

Physical Review D, Particles and fields, 1993
The «problem of time» in canonical quantum gravity refers to the difficulties involved in defining a Hilbert space structure on states, and local observables on this Hilbert space, for a theory in which the spacetime metric is treated as a quantum field,
Wald
semanticscholar   +1 more source

Mitochondrial Ca2+ overload is a pivotal risk factor for lethal ventricular arrhythmias due to the oxidation of mitochondrial respirasome and energetic failure

British Journal of Pharmacology, EarlyView.
The data that support the findings of this study are available from the corresponding author upon reasonable request. Some data may not be made available because of privacy or ethical restrictions. Background and Purpose Ventricular arrhythmias are a leading cause of death among patients with cardiovascular diseases and are associated with elevated ...
Felipe de Jesús Salazar‐Ramírez, Luis Alberto Luévano‐Martínez, Abraham Méndez‐Fernández, Judith Bernal‐Ramírez, Carolina A. Morales‐Ochoa, Christian Silva‐Platas, Alfredo Cabrera‐Orefice, Ana C. Murrieta, José Luis Velasco‐Bolom, Gricelda Mendiola‐Garza, Flavio Contreras‐Torres, Guillermo Torre‐Amione, Ernesto A. Aiello, Gerardo García‐Rivas   +13 more
wiley   +1 more source

Turn‐Induction in Peptides Incorporating Novel Cyrene‐Derived α,α‐Disubstituted Amino Acid

Journal of Peptide Science, Volume 32, Issue 3, March 2026.
Novel chiral cyrene‐derived Cyr residues were incorporated into peptides. The α,α‐disubstituted amino acid residue was introduced using the Ugi reaction. X‐ray crystallographic analysis of R‐ and S‐Cyr residues indicated preference to adopt left‐ and right‐handed α‐helical conformations, respectively.
Kajumee Bora Bhowal, Raphael Hitti, William D. Lubell   +2 more
wiley   +1 more source

Fully Integrated Silicone Electromagnetic Actuators for Untethered and Bio‐Inspired Soft Robotics

Advanced Intelligent Systems, Volume 8, Issue 1, January 2026.
GA: A new class of soft electromagnetic actuators, with embedded coils and magnets, is here presented to enhance portability and usability outside structured environments. These actuators, fabricated through a custom additive manufacturing‐assisted process, offer high responsiveness, energy efficiency, and stretchability.
Antonio Pavone, Rosanna Rifino, Alessio Pricci, Gianni Stano, Gianluca Percoco   +4 more
wiley   +1 more source

Quantum spin dynamics (QSD): VI. Quantum Poincaré algebra and a quantum positivity of energy theorem for canonical quantum gravity [PDF]

, 1997
We quantize the generators of the little subgroup of the asymptotic Poincare group of Lorentzian four-dimensional canonical quantum gravity in the continuum.
T. Thiemann
semanticscholar   +1 more source

Quantum GraviElectro Dynamics

Annalen der Physik, Volume 538, Issue 1, January 2026.
The BRST invariant Lagrangian of the gravitationally interacting U(1)$U(1)$ gauge theory, namely the Quantum GraviElectro Dynamics (QGED). The Yan–Mills theory with the Hilbert–Einstein gravitational Lagrangian, namely the Yang–Mills–Utiyama (YMU) theory, is defined and quantised using the standard procedure. The theory is perturbatively renormalisable,
Yoshimasa Kurihara
wiley   +1 more source

4D spherically symmetric time-dependent quantum gravity amplitudes

European Physical Journal C: Particles and Fields
In these short notes, we compute non-perturbatively the time-dependent quantum gravity amplitudes for a four-dimensional spherically symmetric space-time with space-like and time-like boundaries.
J. A. Rosabal
doaj   +1 more source

Holographic signatures of resolved cosmological singularities

Journal of High Energy Physics, 2019
The classical gravity approximation is often employed in AdS/CFT to study the dual field theory, as it allows for many computations. A drawback is however the generic presence of singularities in classical gravity, which limits the applicability of AdS ...
N. Bodendorfer, A. Schäfer, J. Schliemann   +2 more
doaj   +1 more source

Discriminating quantum gravity models by gravitational decoherence

Nuclear Physics B, 2023
Several phenomenological approaches to quantum gravity predict the existence of a minimal measurable length and/or a maximum measurable momentum near the Planck scale.
Eissa Al-Nasrallah, Saurya Das, Fabrizio Illuminati, Luciano Petruzziello, Elias C. Vagenas   +4 more
doaj   +1 more source