Results 21 to 30 of about 1,876 (240)
Commutatively deformed general relativity: foundations, cosmology, and experimental tests
European 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
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Thermodynamics of an Empty Box
Entropy, 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
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Scattering of fermions in the Yukawa theory coupled to unimodular gravity
European 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
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The constraints of post-quantum classical gravity
Journal 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
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On local invertibility of functions of an h-complex variable
Журнал 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
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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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The Principle of Covariance and the Hamiltonian Formulation of General Relativity
Entropy, 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
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Universal quantum modifications to general relativistic time dilation in delocalised clocks [PDF]
Quantum, 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
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Composite higher derivative theory of gravity
Physical Review Research, 2020 We investigate a higher derivative theory that belongs to the class of composite field theories. Starting from the Yang-Mills theory based on the Lorentz group, we express the gauge vector fields in terms of the tetrad decomposition of a space-time ...
Hans Christian Öttinger
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