Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Pitelli, J. P. M."'
We propose a model for a finite-size particle detector, which allows us to derive its stress-energy tensor. This tensor is obtained from a covariant Lagrangian that describes not only the quantum field that models the detector, $\phi_{\text{d}}$, but
Externí odkaz:
http://arxiv.org/abs/2411.09732
Autor:
Pitelli, J. P. M., Perche, T. Rick
Publikováno v:
Phys. Rev. D 104, 065016 (2021)
We show that gravitons with energy $E<\Omega$, where $\Omega$ is the energy gap a localized non-relativistic system, can be detected by finite-time interactions with a detector. Our detector is based on a quadrupole moment interaction between the hyd
Externí odkaz:
http://arxiv.org/abs/2106.15641
Autor:
Pitelli, J. P. M., Barroso, Vitor S.
In a recent paper [J. P. M. Pitelli, Phys. Rev. D {\bf 99}, 108701 (2019)], one of us showed that the vacuum state associated to conformal fields on a Poicar\'e patch of anti-de Sitter spacetime is not $\text{AdS}$ invariant for fields satisfying non
Externí odkaz:
http://arxiv.org/abs/1908.11742
Autor:
Barroso, Vitor S., Pitelli, J. P. M.
Initial conditions given on a spacelike, static slice of a non-globally hyperbolic spacetime may not define the fates of classical and quantum fields uniquely. Such lack of global hyperbolicity is a well-known property of the anti-de Sitter solution
Externí odkaz:
http://arxiv.org/abs/1904.10920
Autor:
Pitelli, J. P. M.
Publikováno v:
Phys. Rev. D 99, 108701 (2019)
In a recent paper (Phys. Rev. D 94, 125016 (2016)), the authors argued that the singularities of the two-point functions on the Poincar\'e domain of the $n$-dimensional anti-de Sitter spacetime ($\text{PAdS}_n$) have the Hadamard form, regardless of
Externí odkaz:
http://arxiv.org/abs/1904.10023
Publikováno v:
Phys. Rev. D 102, 126018 (2020)
Quantum fluctuations of the vacuum stress-energy tensor are highly non-Gaussian, and can have unexpectedly large effects on spacetime geometry. In this paper, we study a two-dimensional dilaton gravity model coupled to a conformal field, in which the
Externí odkaz:
http://arxiv.org/abs/1809.08265
Autor:
Barroso, V. S., Pitelli, J. P. M.
Publikováno v:
Phys. Rev. D 98, 065009 (2018)
We study the vacuum fluctuations of a massless scalar field $\hat{\Psi}$ on the background of a global monopole. Due to the nontrivial topology of the global monopole spacetime, characterized by a solid deficit angle parametrized by $\eta^2$, we expe
Externí odkaz:
http://arxiv.org/abs/1806.01473
Publikováno v:
Phys. Rev. D 97, 104056 (2018)
An analogue model for the $\text{AdS}_2$ spacetime has been recently introduced by Mosna, Pitelli and Richartz [Phys. Rev. D 94, 104065 (2016)] by considering sound waves propagating on a fluid with an ill-defined velocity profile at its source/sink.
Externí odkaz:
http://arxiv.org/abs/1805.02749
Publikováno v:
Phys. Rev. D 96, 105021 (2017)
We study the scattering of scalar waves propagating on the global monopole background. Since the scalar wave operator in this topological defect is not essentially self-adjoint, its solutions are not uniquely determined until a boundary condition at
Externí odkaz:
http://arxiv.org/abs/1711.03526
Autor:
Barroso, V. S., Pitelli, J. P. M.
We revisit the scattering of quantum test particles on the conical $(2+1)$-dimensional spacetime and find the scatteting amplitude as a function of the boundary conditions imposed at the appex of the cone. We show that the boundary condition is respo
Externí odkaz:
http://arxiv.org/abs/1706.05318