Publications (12)
On a possible nonequilibrium imprint in the cosmic background at low frequencies
Marco Baiesi, Carlo Burigana, Livia Conti +4
The cosmic background radiation has been observed to deviate from the Planck law expected from a blackbody at 2.7 K at frequencies below GHz. We discuss the abundan…
Energy repartition for a harmonic chain with local reservoirs
Gianmaria Falasco, Marco Baiesi, Leo Molinaro +2
We exactly analyze the vibrational properties of a chain of harmonic oscillators in contact with local Langevin heat baths. Nonequilibrium steady-state fluctuations are found to be…
Principles of wide bandwidth acoustic detectors and the single-mass DUAL detector
Michele Bonaldi, Massimo Cerdonio, Livia Conti +7
We apply the standard theory of the elastic body to obtain a set of equations describing the behavior of an acoustic Gravitational Wave detector, fully taking into account the 3-di…
In-situ total scattering investigation of crystalline ordering in amorphous ion-beam sputtered thin films for interferometric gravitational wave detectors
Alberto Martinelli, Giulio Favaro, Giacomo Ciani +9
Amorphous tantala is an important optical material used in a number of high-precision optical applications, including gravitational wave interferometry. In this paper, we study in-…
Statistical distribution of bonding distances in a unidimensional solid
Roman Belousov, Paolo De Gregorio, Lamberto Rondoni +1
We study a Fermi-Pasta-Ulam-like chain with realistic potentials, which models a unidimensional solid in contact with heat baths at some temperature. We formulate an explicit analy…
Effects of breaking vibrational energy equipartition on measurements of temperature in macroscopic oscillators subject to heat flux
Livia Conti, Paolo De Gregorio, Gagik Karapetyan +4
When the energy content of a resonant mode of a crystalline solid in thermodynamic equilibrium is directly measured, assuming that quantum effects can be neglected it coincides wit…
Scattered light noise due to dust particles contamination in the vacuum pipes of the Einstein Telescope
Andrea Moscatello, Giacomo Ciani, Livia Conti
High-sensitivity optical measurements such as those performed in interferometric gravitational wave detectors are prone to scattered light noise. To minimize it, optical components…
Phonon momentum and damping of mechanical resonators
Antonio Borrielli, Enrico Serra, Livia Conti +1
The concept of physical momentum associated to phonons in a crystal, complemented with some fundamental reasoning, implies measurable effects in crystals even at a macroscopic scal…
Search for light scalar Dark Matter candidate with AURIGA detector
Antonio Branca, Michele Bonaldi, Massimo Cerdonio +11
A search for a new scalar field, called moduli, has been performed using the cryogenic resonant-mass AURIGA detector. Predicted by string theory, moduli may provide a significant c…
Communicating the gravitational-wave discoveries of the LIGO-Virgo-KAGRA Collaboration
Hannah Middleton, Christopher P L Berry, Nicolas Arnaud +34
The LIGO-Virgo-KAGRA (LVK) Collaboration has made breakthrough discoveries in gravitational-wave astronomy, a new field that provides a different means of observing our Universe. G…
Addressing the problem of the LIGO-Virgo-KAGRA visibility in the scientific literature
Pablo Barneo, Giuseppe Cabras, Pierre-Francois Cohadon +6
As members of the Virgo Collaboration -- one of the large scientific collaborations that explore the universe of gravitational waves together with the LIGO Scientific Collaboration…
Harmonic damped oscillators with feedback. A Langevin study
Paolo De Gregorio, Lamberto Rondoni, Michele Bonaldi +1
We consider a system in direct contact with a thermal reservoir and which, if left unperturbed, is well described by a memory-less equilibrium Langevin equation of the second order…