Results 41 to 50 of about 11,504,041 (312)
On Equivalence of Definition of the Energy-Momentum Tensor in General Relativity and Field Theory [PDF]
Iranian Journal of Astronomy and AstrophysicsThis work investigates a fundamental pedagogical question concerning the definition of the energy-momentum tensor in theoretical physics. Students learn the definition of energy-momentum tensor in the field theory and on the other hand a different ...
Sohrab Rahvar
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Quantum Black Holes and (Re)Solution of the Singularity
Universe, 2021 Classical general relativity predicts the occurrence of spacetime singularities under very general conditions. Starting from the idea that the spacetime geometry must be described by suitable states in the complete quantum theory of matter and gravity ...
Roberto Casadio
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Classical and quantum two-body problem in general relativity [PDF]
Letters in Mathematical Physics, 1981 The two-body problem in general relativity is reduced to the problem of an effective particle (with an energy-dependent relativistic reduced mass) in an external field. The effective potential is evaluated from the Born diagram of the linearized quantum theory of gravity.
Maheshwari, Amar +2 more
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Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Background Japan has one of the highest dialysis prevalence rates worldwide and a shrinking, aging population. Whether dialysis burden has entered a sustained post‐peak phase or whether recent declines partly reflect pandemic‐related disruptions remains uncertain.
Hatice Şahin +2 more
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Mathematics, 2015 Recently, non-standard Lagrangians have gained a growing importance in theoretical physics and in the theory of non-linear differential equations. However, their formulations and implications in general relativity are still in their infancies despite ...
Rami Ahmad El-Nabulsi
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Editorial to the Special Issue “Probing New Physics with Black Holes”
Universe, 2020 Black holes are fantastic laboratories for probing new physics. Both theoretically and experimentally, many new ideas are emerging to use them as tools for understanding better quantum gravity or classical gravity beyond general relativity.
Aurélien Barrau
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Advances in Classical General Relativity
Current Science, 2015 The year 2015 is the centenary of Einstein's creation of general relativity. Over the century general relativity has gradually increased its footprints on mainstream physics and this article highlights advances in the classical aspects of general relativity since its creation.
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Classical Pseudoparticle Solutions in General Relativity [PDF]
Progress of Theoretical Physics, 1978 In order to investigate the physical connection between the quantum tunneling processes (vacuum-to-vacuum transition or thermal radiation) of Yang-Mills and gravitational pseudo particles, several properties of the Belavin and Schwarzshild solutions are compared with each other.
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Diversity and complexity in neural organoids
FEBS Letters, EarlyView.Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
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The origin of the spacetime metric: Bell's `Lorentzian pedagogy' and its significance in general relativity [PDF]
, 1999 The purpose of this paper is to evaluate the `Lorentzian Pedagogy' defended by J.S. Bell in his essay ``How to teach special relativity'', and to explore its consistency with Einstein's thinking from 1905 to 1952.
Pooley, Oliver, Brown, Harvey R.
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