Zobrazeno 1 - 10
of 236
pro vyhledávání: '"Massimo Tessarotto"'
Publikováno v:
Symmetry, Vol 16, Iss 8, p 1042 (2024)
The meaning of the quantum minimum effective length that should distinguish the quantum nature of a gravitational field is investigated in the context of manifestly covariant quantum gravity theory (CQG-theory). In such a framework, the possible occu
Externí odkaz:
https://doaj.org/article/3e79d5b151e1459daae0e278ab9dc220
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-7 (2021)
Abstract In this letter a new Lagrangian variational principle is proved to hold for the Einstein field equations, in which the independent variational tensor field is identified with the Ricci curvature tensor $$R^{\mu \nu }$$ R μ ν rather than th
Externí odkaz:
https://doaj.org/article/2d3956fc4cde495fb8d44e09369f01d7
Publikováno v:
Symmetry, Vol 15, Iss 6, p 1218 (2023)
The theoretical prediction of the stochastic property of the quantum cosmological constant and the quantum stochastic nature of event horizons has crucial implications on the physics of space-time and black holes in particular. One of these consequen
Externí odkaz:
https://doaj.org/article/13b6c616cffe45e8a28a3299b46699d2
Publikováno v:
Symmetry, Vol 15, Iss 5, p 1112 (2023)
The notion of background independence is a distinguished feature that should characterize the conceptual foundation of any physically-acceptable theory of quantum gravity. It states that the structure of the space-time continuum described by classica
Externí odkaz:
https://doaj.org/article/cc5fff6c90fc420aa032b6341ac898cf
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 6, Pp 1-13 (2021)
Abstract The theoretical problem of establishing the coupling properties existing between the classical and quantum gravitational field with the Ricci and Riemann curvature tensors of General Relativity is addressed. The mathematical framework is pro
Externí odkaz:
https://doaj.org/article/36f4ca61b57b40aca2e413521e2dba58
Publikováno v:
Entropy, Vol 25, Iss 2, p 337 (2023)
This paper deals with the problem of establishing a systematic theoretical formulation of variational principles for the continuum gravitational field dynamics of classical General Relativity (GR). In this reference, the existence of multiple Lagrang
Externí odkaz:
https://doaj.org/article/ef5aec488b8146589c77cb9722246e24
Publikováno v:
Symmetry, Vol 14, Iss 11, p 2229 (2022)
Background independence is often being claimed as the characteristic property of several current and past models of Quantum Gravity. In actual fact, such a notion has a wider connotation and must be rooted into the validity of the general covariance
Externí odkaz:
https://doaj.org/article/7132858240284e51b82f4f539ff1c5cb
Publikováno v:
Symmetry, Vol 14, Iss 10, p 2083 (2022)
The implications of the principles of general and manifest covariance, together with those of the objectivity principle, are considered for the purpose of establishing a DeDonder–Weyl-type Hamiltonian variational formulation for classical general r
Externí odkaz:
https://doaj.org/article/c9ed9f15d7754bc6bd2f777a2b4d9eaf
The problem posed by the possible existence/non-existence of spatially non-symmetric kinetic equilibria has remained unsolved in plasma theory. For collisionless magnetized plasmas this involves the construction of stationary solutions of the Vlasov-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2caaf6c2259604fccb7873bd0faadcbe
http://arxiv.org/abs/2307.00090
http://arxiv.org/abs/2307.00090
This paper is concerned with the kinetic treatment of quasi-stationary axisymmetric collisionless accretion disc plasmas. The conditions of validity of the kinetic description for non-relativistic magnetized and gravitationally-bound plasmas of this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0a14a3a8c46a64a012e4855d8a3fada
http://arxiv.org/abs/2306.15949
http://arxiv.org/abs/2306.15949