Zobrazeno 1 - 10
of 328
pro vyhledávání: '"Dionigi,M"'
Autor:
Belenchia, Alessio, Benincasa, Dionigi M. T., Marin, Francesco, Marino, Francesco, Ortolan, Antonello, Paternostro, Mauro, Liberati, Stefano
Publikováno v:
Class. Quantum Grav.36 155006 (2019)
Motivated by the development of on-going optomechanical experiments aimed at constraining non-local effects inspired by some quantum gravity scenarios, the Hamiltonian formulation of a non-local harmonic oscillator, and its coupling to a cavity field
Externí odkaz:
http://arxiv.org/abs/1901.05819
Publikováno v:
In The Journal of Space Safety Engineering September 2022 9(3):328-340
Publikováno v:
Class.Quant.Grav. 35 (2018) no.7, 074002
In order to understand the detailed mechanism by which a fundamental discreteness can provide a finite entanglement entropy, we consider the entanglement entropy of two classes of free massless scalar fields on causal sets that are well approximated
Externí odkaz:
http://arxiv.org/abs/1712.04227
Publikováno v:
Phys. Rev. D 96, 116006 (2017)
The signaling between two observers in 3+1 dimensional flat spacetime coupled locally to a non-local field is considered. We show that in the case where two observers are purely timelike related -- so that an exchange of on-shell massless quanta cann
Externí odkaz:
http://arxiv.org/abs/1707.01654
Autor:
Belenchia, Alessio, Benincasa, Dionigi M. T., Liberati, Stefano, Marin, Francesco, Marino, Francesco, Ortolan, Antonello
Publikováno v:
Phys. Rev. D 95, 026012 (2017)
The nonrelativistic limit of nonlocal modifications to the Klein Gordon operator is studied, and the experimental possibilities of casting stringent constraints on the nonlocality scale via planned and/or current optomechanical experiments are discus
Externí odkaz:
http://arxiv.org/abs/1611.07959
Publikováno v:
Phys. Rev. D 94, 061902(R) (2016)
The response of inertial particle detectors coupled to a scalar field satisfying nonlocal dynamics described by nonanalytic functions of the d'Alembertian operator $\Box$ is studied. We show that spontaneous emission processes of a low energy particl
Externí odkaz:
http://arxiv.org/abs/1605.03973
Autor:
Belenchia, Alessio, Benincasa, Dionigi M. T., Liberati, Stefano, Marin, Francesco, Marino, Francesco, Ortolan, Antonello
Publikováno v:
Phys. Rev. Lett. 116, 161303 (2016)
Several quantum gravity scenarios lead to physics below the Planck scale characterised by nonlocal, Lorentz invariant equations of motion. We show that such non-local effective field theories lead to a modified Schr\"odinger evolution in the nonrelat
Externí odkaz:
http://arxiv.org/abs/1512.02083
The continuum limit of a 4-dimensional, discrete d'Alembertian operator for scalar fields on causal sets is studied. The continuum limit of the mean of this operator in the Poisson point process in 4-dimensional Minkowski spacetime is shown to be the
Externí odkaz:
http://arxiv.org/abs/1510.04656
Publikováno v:
Phys. Rev. D 93, 044017 (2016)
We investigate the spectral dimension obtained from non-local continuum d'Alembertians derived from causal sets. We find a universal dimensional reduction to 2 dimensions, in all dimensions. We conclude by discussing the validity and relevance of our
Externí odkaz:
http://arxiv.org/abs/1507.00330
Publikováno v:
JHEP 1503 (2015) 036
We study a non-local scalar quantum field theory in flat spacetime derived from the dynamics of a scalar field on a causal set. We show that this non-local QFT contains a continuum of massive modes in any dimension. In 2 dimensions the Hamiltonian is
Externí odkaz:
http://arxiv.org/abs/1411.6513