Results 11 to 20 of about 12,773,809 (282)

Commutatively deformed general relativity: foundations, cosmology, and experimental tests

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
An integral kernel representation for the commutative $$\star $$ ⋆ -product on curved classical spacetime is introduced. Its convergence conditions and relationship to a Drin’feld differential twist are established.
P. G. N. de Vegvar
doaj   +1 more source

Thermodynamics of an Empty Box

open access: yesEntropy, 2023
A gas in a box is perhaps the most important model system studied in thermodynamics and statistical mechanics. Usually, studies focus on the gas, whereas the box merely serves as an idealized confinement.
Georg J. Schmitz   +5 more
doaj   +1 more source

The Logic of Quantum Mechanics Derived from Classical General Relativity [PDF]

open access: yes, 1997
For the first time it is shown that the logic of quantum mechanics can be derived from Classical Physics. An orthomodular lattice of propositions, characteristic of quantum logic, is constructed for manifolds in Einstein's theory of general relativity. A
Hadley, Mark J.
core   +1 more source

Scattering of fermions in the Yukawa theory coupled to unimodular gravity

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
We compute the lowest order gravitational UV divergent radiative corrections to the S matrix element of the $$fermion + fermion\rightarrow fermion + fermion$$ fermion+fermion→fermion+fermion scattering process in the massive Yukawa theory, coupled either
S. Gonzalez-Martin, C. P. Martin
doaj   +1 more source

The constraints of post-quantum classical gravity

open access: yesJournal of High Energy Physics, 2022
We study a class of theories in which space-time is treated classically, while interacting with quantum fields. These circumvent various no-go theorems and the pathologies of semi-classical gravity, by being linear in the density matrix and phase-space ...
Jonathan Oppenheim   +1 more
doaj   +1 more source

On local invertibility of functions of an h-complex variable

open access: yesЖурнал Белорусского государственного университета: Математика, информатика, 2022
The theory of functions of an h-complex variable is an alternative to the usual theory of functions of a complex variable, obtained by replacing the rules of multiplication.
Vladislav A. Pavlovsky, Igor L. Vasiliev
doaj   +1 more source

On Equivalence of Definition of the Energy-Momentum Tensor in General Relativity and Field Theory [PDF]

open access: yesIranian Journal of Astronomy and Astrophysics
This 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
doaj   +1 more source

The Principle of Covariance and the Hamiltonian Formulation of General Relativity

open access: yesEntropy, 2021
The implications of the general covariance principle for the establishment of a Hamiltonian variational formulation of classical General Relativity are addressed.
Massimo Tessarotto, Claudio Cremaschini
doaj   +1 more source

Universal quantum modifications to general relativistic time dilation in delocalised clocks [PDF]

open access: yesQuantum, 2020
The theory of relativity associates a proper time with each moving object via its world line. In quantum theory however, such well-defined trajectories are forbidden. After introducing a general characterisation of quantum clocks, we demonstrate that, in
Shishir Khandelwal   +2 more
doaj   +1 more source

About the origins of the general theory of relativity: Einstein's search for the truth [PDF]

open access: yes, 2005
On the 20th June 1933 Professor Einstein addressed a large and enthusiastic audience in the Victorian Gothic Bute Hall of the University of Glasgow. Einstein spoke 'About the Origins of the General Theory of Relativity'.
Trainer, M.
core   +2 more sources

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