Results 21 to 30 of about 64,798 (158)
The Immirzi parameter in quantum general relativity
, 1997 Barbero has generalized the Ashtekar canonical transformation to a one-parameter scale transformation $U(\iota)$ on the phase space of general relativity.
Rovelli, Carlo, Thiemann, Thomas
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On the area operators of the Husain-Kuchar-Rovelli model and Canonical/Loop Quantum Gravity [PDF]
, 1998 I investigate the relation between an operative definition of the area of a surface specified by matter fields and the area operators recently introduced in the canonical/loop approach to Quantum Gravity and in Rovelli's variant of the Husain-Kuchar ...
Bohr N. +3 more
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Canonical quantum gravity on noncommutative space–time [PDF]
International Journal of Modern Physics A, 2015 In this paper canonical quantum gravity on noncommutative space–time is considered. The corresponding generalized classical theory is formulated by using the Moyal star product, which enables the representation of the field quantities depending on noncommuting coordinates by generalized quantities depending on usual coordinates.
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Axion‐Like Interactions and CFT in Topological Matter, Anomaly Sum Rules and the Faraday Effect
Advanced Physics Research, EarlyView.This review investigates the connection between chiral anomalies and their manifestation in topological materials, using both perturbative methods based on ordinary quantum field theory and conformal field theory (CFT). It emphasizes the role of CFT in momentum space for parity‐odd correlation functions, and their reconstruction by the inclusion of a ...
Claudio Corianò +4 more
wiley +1 more source
General Relativity without paradigm of space-time covariance, and resolution of the problem of time
, 2014 The framework of a theory of gravity from the quantum to the classical regime is presented. The paradigm shift from full spacetime covariance to spatial diffeomorphism invariance, together with clean decomposition of the canonical structure, yield ...
Soo, Chopin, Yu, Hoi-Lai
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Propagating spin modes in canonical quantum gravity [PDF]
Physical Review D, 1999 One of the main results in canonical quantum gravity is the introduction of spin network states as a basis on the space of kinematical states. To arrive at the physical state space of the theory though we need to understand the dynamics of the quantum gravitational states. To this aim we study a model in which we allow for the spins, labeling the edges
Sameer Gupta, Roumen Borissov
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Astronomische Nachrichten, EarlyView.ABSTRACT We investigate the effects of a minimal measurable length on neutron stars, within the quantum hadrodynamics (QHD‐I) model modified by the Generalized Uncertainty Principle (GUP). Working in a deformed Poisson algebra framework, we incorporate GUP effects via a time‐invariant transformation of the phase space volume, effectively reducing the ...
João Gabriel Galli Gimenez +2 more
wiley +1 more source
Quantum self-gravitating collapsing matter in a quantum geometry [PDF]
, 2016 The problem of how space-time responds to gravitating quantum matter in full quantum gravity has been one of the main questions that any program of quantization of gravity should address.
Campiglia, Miguel +3 more
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ChemPhotoChem, EarlyView.Herein, we carried out an in‐depth study into the synthesis, optoelectronic characterisation, and charge carrier dynamics of the bismuth oxobromide/ copper phthalocyanine (BiOBr/CuPc) composite system for UV and visible light photocatalytic nitrogen oxide (NOx) removal on air purification filters.
Oyelusi Olaifa +6 more
wiley +1 more source
COSMOLOGICAL ISSUES FOR REVISED CANONICAL QUANTUM GRAVITY [PDF]
International Journal of Modern Physics D, 2003 In a recent work1 we presented a reformulation of the canonical quantum gravity, based on adding the so-called kinematical term to the gravity-matter action. This revised approach leads to a self-consistent canonical quantization of the 3-geometries, which referred to the external time as provided via the added term. Here, we show how the kinematical
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