Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Pesci, Alessandro"'
In this paper, we will explore Padmanabhan's mesoscopic, statistical approach to gravity [62] with a twist. The general picture of his approach is that spacetime is made of large numbers of localized quantum degrees of freedom. Padmanabhan assumed th
Externí odkaz:
http://arxiv.org/abs/2407.13317
Autor:
Pesci, Alessandro, Pieri, Pierbiagio
Publikováno v:
Phys. Rev. A 108, 062801 (2023)
Most of the existing proposals for laboratory tests of a quantum nature of gravity are based on the use of two delocalized masses or harmonically bound masses prepared in pure quantum states with large enough spatial extent. Here a setup is proposed
Externí odkaz:
http://arxiv.org/abs/2307.09354
Autor:
Pesci, Alessandro
Publikováno v:
Quantum Rep. 5 (2023) 426
In a known gedanken experiment, a delocalized mass is recombined while the gravitational field sourced by it is probed by another (distant) particle; in it, this is used to explore a possible tension between complementarity and causality in case the
Externí odkaz:
http://arxiv.org/abs/2209.10355
Autor:
Pesci, Alessandro
Publikováno v:
Gen. Rel. Grav. 54 (2022) 72
In the vast amount of results linking gravity with thermodynamics, statistics, information, a path is described which tries to explore this connection from the point of view of (non)locality of the gravitational field. First the emphasis is put on th
Externí odkaz:
http://arxiv.org/abs/2207.12155
Autor:
Pesci, Alessandro
Publikováno v:
Particles 5(4) (2022) 426
Starting from some results regarding the form of the Ricci scalar at a point $P$ in a spacetime endowed with a minimum distance, we investigate how they might be accommodated, specifically for the case of null separations, in a as-simple-as-possible
Externí odkaz:
http://arxiv.org/abs/2105.07764
Autor:
Pesci, Alessandro
Publikováno v:
Int. J. Mod. Phys. D 31 (2022) 2250007
In this paper, we consider a specific model, implementing the existence of a fundamental limit distance $L_0$ between (space or time separated) points in spacetime, which in the recent past has exhibited the intriguing feature of having a minimum-len
Externí odkaz:
http://arxiv.org/abs/2010.10063
Autor:
Pesci, Alessandro
Publikováno v:
Class. Quantum Grav. 38 (2021) 145007
We study the recently reported qmetric (or zero-point-length) expressions of the Ricci (bi)scalar $R_{(q)}$ (namely, expressions of the Ricci scalar in a spacetime with a limit length $L_0$ built in), focusing specifically on the case of null separat
Externí odkaz:
http://arxiv.org/abs/2005.03258
Autor:
Pesci, Alessandro
Publikováno v:
Phys. Rev. D 102, 124057 (2020)
We consider spacetime endowed with a zero-point length, i.e. with an effective metric structure which allows for a (quantum-mechanically arising) finite distance $L_0$ between events in the limit of their coincidence. Restricting attention to null se
Externí odkaz:
http://arxiv.org/abs/1911.04135
Publikováno v:
Phys. Lett. B 797, 134877 (2019)
The Raychaudhuri equation for a geodesic congruence in the presence of a zero-point length has been investigated. This is directly related to the small-scale structure of spacetime and possibly captures some quantum gravity effects. The existence of
Externí odkaz:
http://arxiv.org/abs/1904.09053
Autor:
Pesci, Alessandro
Publikováno v:
Class. Quantum Grav. 36 (2019) 075009
Recently, a proposal has been made to figure out the expected discrete nature of spacetime at the smallest scales in terms of atoms of spacetime, capturing their effects through a scalar $\rho$, related to their density, function of the point $P$ and
Externí odkaz:
http://arxiv.org/abs/1812.01275