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Cavity Detection of Gravitational Waves: Where Do We Stand?
Claudio Gatti, Luca Visinelli, Michael Zantedeschi
High frequency gravitational waves (HFGWs) are predicted in various exotic scenarios involving both cosmological and astrophysical sources. These elusive signals have recently spar…
Observational Constraints on Warm Natural Inflation
Gabriele Montefalcone, Vikas Aragam, Luca Visinelli +1
Warm natural inflation is studied for the case of the original cosine potential. The radiation bath during inflation induces a dissipation (friction) rate in the equation of motion…
Constraints on the scalar-field potential in warm inflation
Gabriele Montefalcone, Vikas Aragam, Luca Visinelli +1
We quantify the degree of fine tuning required to achieve an observationally viable period of inflation in the strongly dissipative regime of warm inflation. The ``fine-tuning'' pa…
Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
Sunny Vagnozzi, Rittick Roy, Yu-Dai Tsai +12
Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime. We conside…
Concerns regarding the use of black hole shadows as standard rulers
Sunny Vagnozzi, Cosimo Bambi, Luca Visinelli
Recently, Tsupko et al. have put forward the very interesting proposal to use the shadows of high-redshift supermassive black holes (SMBHs) as standard rulers. This would in princi…
Do we have any hope of detecting scattering between dark energy and baryons through cosmology?
Sunny Vagnozzi, Luca Visinelli, Olga Mena +1
We consider the possibility that dark energy and baryons might scatter off each other. The type of interaction we consider leads to a pure momentum exchange, and does not affect th…