Results 141 to 150 of about 59,677 (306)
Spin Foams and Canonical Quantization
Symmetry, Integrability and Geometry: Methods and Applications, 2012 This review is devoted to the analysis of the mutual consistency of the spin foam and canonical loop quantizations in three and four spacetime dimensions.
Sergei Alexandrov +2 more
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Constraining the loop quantum gravity parameter space from phenomenology
Physics Letters B, 2018 Development of quantum gravity theories rarely takes inputs from experimental physics. In this letter, we take a small step towards correcting this by establishing a paradigm for incorporating putative quantum corrections, arising from canonical quantum ...
Suddhasattwa Brahma, Michele Ronco
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A quantum reduction to spherical symmetry in loop quantum gravity
Physics Letters B, 2015 Based on a recent purely geometric construction of observables for the spatial diffeomorphism constraint, we propose two distinct quantum reductions to spherical symmetry within full 3+1-dimensional loop quantum gravity.
N. Bodendorfer +2 more
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Criticality in the collapse of spherically symmetric massless scalar fields in semiclassical loop quantum gravity [PDF]
, 2021 Florencia Benítez +3 more
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Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Coal is a natural macromolecular substance composed of complex organic molecules and a small amount of minerals. Its chemical composition and microstructure are highly complex and variable, and no unified definition exists. This inherent structural complexity underscores the theoretical significance of constructing accurate macromolecular ...
Chao Zhou +5 more
wiley +1 more source
Quantization of Midisuperspace Models
Living Reviews in Relativity, 2010 We give a comprehensive review of the quantization of midisuperspace models. Though the main focus of the paper is on quantum aspects, we also provide an introduction to several classical points related to the definition of these models.
J. Fernando Barbero G. +1 more
doaj
Discrete Gravity Models and Loop Quantum Gravity: a Short Review
Symmetry, Integrability and Geometry: Methods and Applications, 2012 We review the relation between Loop Quantum Gravity on a fixed graph and discrete models of gravity. We compare Regge and twisted geometries, and discuss discrete actions based on twisted geometries and on the discretization of the Plebanski action.
Simone Speziale +2 more
doaj +1 more source
Loop Quantum Gravity and Cosmology: A dynamical introduction [PDF]
, 2011 Martin Bojowald
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Micro/nanorobots for detecting and eliminating biological and chemical warfare agents
BMEMat, EarlyView.Fuel‐powered and field‐driven micro/nanorobots provide a cutting‐edge platform to safeguard national security and defense. This review reports the latest research progress in micro/nanorobots in sensing and detoxifying biological and chemical warfare agents.
Song Li +4 more
wiley +1 more source
Quantum General Invariance and Loop Gravity
Foundations of Physics, 2001 A quantum physical projector is proposed for generally covariant theories which are derivable from a Lagrangian. The projector is the quantum analogue of the integral over the generators of finite one-parameter subgroups of the gauge symmetry transformations which are connected to the identity.
openaire +2 more sources