Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Giovanni Acquaviva"'
Publikováno v:
Universe, Vol 8, Iss 9, p 455 (2022)
Analogs of fundamental physical phenomena can be used in two ways. One way consists in reproducing specific aspects of the classical or quantum gravity of quantum fields in curved space or of other high-energy scenarios on lower-energy corresponding
Externí odkaz:
https://doaj.org/article/37e35ea7d1a64e08b6fb7b0098f6c367
Analogs of fundamental physical phenomena can be used in two ways. One way consists in reproducing specific aspects of classical or quantum gravity, of quantum fields in curved space or of other high-energy scenarios, on lower-energy corresponding sy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cfb6821aa3adca58d9464e8d6d13b6a
Autor:
Giovanni Acquaviva, Nihan KATIRCI
We perform the dynamical system analysis of a cosmological model in the energy-momentum squared gravity (EMSG) of the form $f(T_{\mu\nu}T^{\mu\nu})=\alpha\ln({\lambda}T_{\mu\nu} T^{\mu\nu})$, which is known as energy-momentum log gravity (EMLG). In p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee2a9bfd04051b2908dd48ac9c1fb5fe
In Polymer Quantum Mechanics, a quantization scheme that naturally emerges from Loop Quantum Gravity, position and momentum operators cannot be both well defined on the Hilbert space [Formula: see text]. It is henceforth deemed impossible to define s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9a2e229a1dffb9585aafe9abf593640
http://arxiv.org/abs/2105.14792
http://arxiv.org/abs/2105.14792
Publikováno v:
INSPIRE-HEP
In this work, we first discuss the possibility that dark energy models with negative energy density values in the past can alleviate the $H_0$ tension, as well as the discrepancy with the baryon acoustic oscillation (BAO) Lyman-$\alpha$ data, both wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28bba49c7560451919cc0f52e03fbdfb
http://arxiv.org/abs/2104.02623
http://arxiv.org/abs/2104.02623
Publikováno v:
Scopus-Elsevier
Here we briefly resume the idea, originally introduced in Phys. Rev. D 102, 106002 (2020), that the Bekenstein bound on entropy is a consequence of the fermionic nature of fundamental degrees of freedom, which arrange themselves to form matter and sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a7c47aee81858410888fe5947f1c1ba
https://doi.org/10.22323/1.390.0681
https://doi.org/10.22323/1.390.0681
We discuss the representations of the algebra of quantization, the canonical commutation relations, in a scalar quantum field theory with spontaneously broken U(1) internal symmetry, when a topological defect of the vortex type is formed via the cond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5f6f9ba89be5e11893f44e5d3a8acb6
http://arxiv.org/abs/2012.09929
http://arxiv.org/abs/2012.09929
In this article we perform dynamical analysis of a broad class of barotropic fluids in the spatially curved Friedmann-Robertson-Walker (FRW) spacetime background without considering the cosmological constant. The first part of our study concerns the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a199407b868f5cdcb0635f21b9d30c5f
http://arxiv.org/abs/2001.00825
http://arxiv.org/abs/2001.00825
Publikováno v:
Physical Review
Assuming that the degrees of freedom of a black hole are finite in number and of fermionic nature, we naturally obtain, within a second-quantized toy model of the evaporation, that the Bekenstein bound is a consequence of the Pauli exclusion principl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd8f8718a2296e45238766881ea7ecd2
In this work we perform a dynamical analysis of a broad class of non-minimally coupled real scalar fields in the Friedmann-Robertson-Walker (FRW) spacetime framework. The first part of our study concerns the dynamics of an unspecified positive potent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45964aa98c61db2501469fc4da8a5162
http://arxiv.org/abs/1905.08512
http://arxiv.org/abs/1905.08512