Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Landulfo, A. G. S."'
A long-standing problem in physics is why observed masses are always positive. While energy conditions in quantum field theory can partly answer this problem, in this paper we find evidence that classical general relativity abhors negative masses, wi
Externí odkaz:
http://arxiv.org/abs/2408.00154
We discuss the information loss issue for completely evaporating black holes in the context of a globally hyperbolic spacetime that maintains unchanged the entire semiclassical picture except for the ``last evaporation breath,'' which pertains to ful
Externí odkaz:
http://arxiv.org/abs/2402.19140
Publikováno v:
Phys. Rev. D 109, 045006 (2024)
The observation of gravitational waves opens up a new window to probe the universe and the nature of the gravitational field itself. As a result, they serve as a new and promising tool to not only test our current theories but to study different mode
Externí odkaz:
http://arxiv.org/abs/2311.06032
We investigate the transmission of classical and quantum information between three observers in a general globally hyperbolic spacetime using a quantum scalar field as a communication channel. We build a model for a quantum broadcast channel in which
Externí odkaz:
http://arxiv.org/abs/2309.14535
Publikováno v:
Phys. Rev. D 106, 065002 (2022)
A great deal of evidence has been mounting over the years showing a deep connection between acceleration, radiation, and the Unruh effect. Indeed, the fact that the Unruh effect can be codified in the Larmor radiation emitted by the charge was used t
Externí odkaz:
http://arxiv.org/abs/2205.15183
Publikováno v:
Phys. Rev. D 104, 105018 (2021)
We consider the communication of classical and quantum information between two arbitrary observers in asymptotically flat spacetimes (possibly containing black holes) and investigate what is the energy cost for such information transmission. By means
Externí odkaz:
http://arxiv.org/abs/2109.13896
Publikováno v:
Phys. Rev. D 102, 105016 (2020)
Although the thermal and radiative effects associated with a two-level quantum system undergoing acceleration are now widely understood and accepted, a surprising amount of controversy still surrounds the simpler and older problem of an accelerated c
Externí odkaz:
http://arxiv.org/abs/2009.13246
Publikováno v:
Phys. Rev. D 102, 093003 (2020)
We analyze the problem of neutrino oscillations via a fermionic particle detector model inspired by the physics of the Fermi theory of weak interactions. The model naturally leads to a description of emission and absorption of neutrinos in terms of l
Externí odkaz:
http://arxiv.org/abs/2009.10165
Publikováno v:
Phys. Rev. D 103, 045012 (2021)
The study of black hole physics revealed a fundamental connection between thermodynamics, quantum mechanics, and gravity. Today, it is known that black holes are thermodynamical objects with well-defined temperature and entropy. Although black hole r
Externí odkaz:
http://arxiv.org/abs/2008.04951
Publikováno v:
Phys. Rev. D 101, 065015 (2020)
We look for classical traces of the Unruh effect in gravity waves. For this purpose, we start considering a white noise state of gravity waves on the surface of a water basin and calculate the two- and four-point functions of the Fourier transform of
Externí odkaz:
http://arxiv.org/abs/2001.04429