Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Luca Santoni"'
Autor:
Mudit Rai, Luca Santoni
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-33 (2024)
Abstract It is well known that asymptotically flat black holes in general relativity have vanishing tidal Love numbers. In the case of Schwarzschild and Kerr black holes, this property has been shown to be a consequence of a hidden structure of ladde
Externí odkaz:
https://doaj.org/article/0850d79a7233401ca578043cf445629c
Publikováno v:
Physics Letters B, Vol 854, Iss , Pp 138710- (2024)
It is well known that asymptotically flat Schwarzschild black holes in general relativity in four spacetime dimensions have vanishing induced linear tidal response. We extend this result beyond linear order for the polar sector, by solving the static
Externí odkaz:
https://doaj.org/article/30ee47c481bd4ce49c7c358f8862946f
Autor:
Alessandro Podo, Luca Santoni
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 2, Pp 1-33 (2024)
Abstract We study relativistic fermionic systems in 3 + 1 spacetime dimensions at finite chemical potential and zero temperature, from a path-integral point of view. We show how to properly account for the iε term that projects on the finite density
Externí odkaz:
https://doaj.org/article/4ca67ea145b44c75ab1fd3163ba6f814
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 9, Pp 1-51 (2023)
Abstract We consider U(1)-symmetric scalar quantum field theories at zero temperature. At nonzero charge densities, the ground state of these systems is usually assumed to be a superfluid phase, in which the global symmetry is spontaneously broken al
Externí odkaz:
https://doaj.org/article/c8f4461784d248c6a66d23b15fc92ac7
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-30 (2023)
Abstract Quasinormal modes describe the ringdown of compact objects deformed by small perturbations. In generic theories of gravity that extend General Relativity, the linearized dynamics of these perturbations is described by a system of coupled lin
Externí odkaz:
https://doaj.org/article/489f30606d104232b6380e8627d3cb69
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 2, Pp 1-49 (2023)
Abstract We derive soft theorems for theories in which time symmetries — symmetries that involve the transformation of time, an example of which are Lorentz boosts — are spontaneously broken. The soft theorems involve unequal-time correlation fun
Externí odkaz:
https://doaj.org/article/002781959e004ababedd78d9ad1a8494
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-13 (2022)
Abstract We study the near-zone symmetries of a massless scalar field on four-dimensional black hole backgrounds. We provide a geometric understanding that unifies various recently discovered symmetries as part of an SO(4, 2) group. Of these, a subse
Externí odkaz:
https://doaj.org/article/abaa64109fe24d67a821d58c16e0aa63
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-25 (2022)
Abstract We revisit certain subtleties of renormalization that arise when one derives a low-energy effective action by integrating out the heavy fields of a more complete theory. Usually these subtleties are circumvented by matching some physical obs
Externí odkaz:
https://doaj.org/article/51af1103bf4a4803a1a65b5d6605c03e
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 1, Pp 1-41 (2022)
Abstract We study the generation of a large power spectrum, necessary for primordial black hole formation, within the effective theory of single-field inflation. The mechanisms we consider include a transition into a ghost-inflation-like phase and sc
Externí odkaz:
https://doaj.org/article/bdefb2ec49d746d4aa1a2b843aca7550
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-42 (2021)
Abstract We develop the effective theory for perturbations around black holes with scalar hair, in two directions. First, we show that the scalar-Gauss-Bonnet theory, often used as an example exhibiting scalar black hole hair, can be deformed by gali
Externí odkaz:
https://doaj.org/article/4ec27751a8f8485095acdd9d6801e0a7