Results 61 to 70 of about 3,971 (207)
Non-minimal tinges of Unimodular Gravity
Journal of High Energy Physics, 2020 Unimodular Gravity is normally assumed to be equivalent to General Relativity for all matters but the character of the Cosmological Constant. Here we discuss this equivalence in the presence of a non-minimally coupled scalar field.
Mario Herrero-Valea +1 more
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Topical collection: in memory of professor T Padmanabhan
, 2022 Professor Thanu Padmanabhan contributed significantly to a broad spectrum of topics in astrophysics, cosmology, and classical and quantum aspects of gravitation.
Virmani, Amitabh +3 more
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Unifying physics theories with a single postulate
Physics OpenHumans have developed mathematical theories to explain observed physical phenomena in nature. However, the links between these theories are not fully understood in 2024.
F. Salmon
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The history and the meaning of Einstein’s Principle of Equivalence
Science & Philosophy, 2020 We review from a historical and a didactic point of view the Equivalence Principle, which was considered by Einstein as the corner stone of his new theory of Gravitation: the General Relativity.
Antonio Feoli
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Mass and energy in general relativity [PDF]
, 2015 We consider the Denisov-Solov'ov example which shows that the inertial mass is not well defined in General Relativity. It is shown that the mathematical reason why this is true is a wrong application of the Stokes theorem. Then we discuss the role of the
Rodrigues Jr., Waldyr A., Bozhkov, Yuri
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The 5D Fully-Covariant Theory of Gravitation and Its Astrophysical Applications
Galaxies, 2014 In this paper, we comprehensively review the five-dimensional (5D) fully-covariant theory of gravitation developed by Zhang two decades ago and its recent applications in astrophysics and cosmology. This 5D gravity describes not only the fields, but also
Tianxi Zhang
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Some Thoughts on Relativity and the Flow of Time: Einstein's Equations given Absolute Simultaneity [PDF]
, 2004 The A-theory of time has intuitive and metaphysical appeal, but suffers from tension, if not inconsistency, with the special and general theories of relativity (STR and GTR).
Pitts, J. Brian
core
, 2012 Quantum gravity--the marriage of quantum physics with general relativity--is bound to contain deep and important lessons for the nature of physical time.
Vistarini, Tiziana +5 more
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The ΛCDM-NG Cosmological Model: A Possible Resolution of the Hubble Tension
The Astrophysical JournalWe offer a cosmological model based on conventional general relativity (no speculative physics) that may resolve the Hubble tension. A reanalysis of the foundation of the Lambda-CDM model shows that general relativity alone does not specify what fraction
Richard J. Cook
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Hierarchical Test of General Relativity with Gravitational Waves
Physical Review Letters, 2019 We propose a hierarchical approach to testing general relativity with multiple gravitational wave detections. Unlike existing strategies, our method does not assume that parameters quantifying deviations from general relativity are either common or completely unrelated across all sources.
Maximiliano Isi +2 more
openaire +5 more sources