Unimodular gravity vs general relativity: a status report [PDF]
Classical and quantum gravity, 2022 Unimodular gravity (UG) is an alternative to general relativity (GR) which, however, is so closely related to the latter that one can wonder to what extent they are different.
R. Carballo-Rubio +2 more
semanticscholar +1 more source
Space-like singularities of general relativity: A phantom menace? [PDF]
General Relativity and Gravitation, 2022 The big bang and the Schwarzschild singularities are space-like. They are generally regarded as the ‘final frontiers’ at which space–time ends and general relativity breaks down.
A. Ashtekar +2 more
semanticscholar +1 more source
Towards Multifractality through an Ernst-Type Potential in Complex Systems Dynamics
Entropy, 2023 Some possible correspondences between the Scale Relativity Theory and the Space–Time Theory can be established. Since both the multifractal Schrödinger equation from the Scale Relativity Theory and the General Relativity equations for a gravitational ...
Vlad Ghizdovat +5 more
doaj +1 more source
"Mysteries" of modern physics and the fundamental constants c, h, and G
Quanta, 2022 We review how the kinematic structures of special relativity and quantum mechanics both stem from the relativity principle, i.e., "no preferred reference frame" (NPRF). Essentially, NPRF applied to the measurement of the speed of light c gives the light
W. M. Stuckey +2 more
doaj +1 more source
Exploring the unification of quantum theory and general relativity with a Bose–Einstein condensate [PDF]
New Journal of Physics, 2018 Despite almost a century’s worth of study, it is still unclear how general relativity (GR) and quantum theory (QT) should be unified into a consistent theory.
R. Howl, R. Penrose, I. Fuentes
semanticscholar +1 more source
An Elementary Canonical Classical and Quantum Dynamics for General Relativity [PDF]
The European Physical Journal Plus, 2018 A consistent canonical classical and quantum dynamics in the framework of special relativity was formulated by Stueckelberg in 1941, and generalized to many body theory by Horwitz and Piron in 1973 (SHP).
L. Horwitz
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Quantum complementarity of clocks in the context of general relativity [PDF]
Classical and quantum gravity, 2018 Clocks play a special role at the interface of general relativity and quantum mechanics. We analyze a clock-interferometry thought experiment and go on to theoretically derive and experimentally test a complementarity relation for quantum clocks in the ...
Zhifan Zhou +4 more
semanticscholar +1 more source
An Improved Framework for Quantum Gravity
Universe, 2020 General relativity has two fundamental problems that render it unsuitable for tackling the gravitational field’s quantization. The first problem is the lack of a genuine gravitational variable representing gravitation only, inertial forces apart.
José G. Pereira, Diego F. López
doaj +1 more source
A Postquantum Theory of Classical Gravity?
Physical Review X, 2023 The effort to discover a quantum theory of gravity is motivated by the need to reconcile the incompatibility between quantum theory and general relativity.
Jonathan Oppenheim
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Phantom singularities and their quantum fate: general relativity and beyond—a CANTATA COST action topic [PDF]
General Relativity and Gravitation, 2019 Cosmological observations allow the possibility that dark energy is caused by phantom fields. These fields typically lead to the occurrence of singularities in the late Universe.
Mariam Bouhmadi-L'opez +2 more
semanticscholar +1 more source