Gravitational waves

Gravitational waves


Marco Bazzan, Giacomo Ciani, Livia Conti, INFN Padov, Matteo Pegoraro, INFN Padova, Gabriele Vedovato, INFN Padova, Lisa Zangrando, INFN Padova, Jean-Pierre Zendri, INFN Padova


Claudia Lazzaro, INFN Padova, Marco Vardaro, Univ. Padova. 

Research Activity

The Padova-Trento Virgo group comprises researchers from INFN Padova and TIFPA Trento and Universities of Padova and Trento. The group is part of the Virgo collaboration, which has built and operates Advanced Virgo, a 3-km long interferometric gravitational wave detector near Cascina (Pisa). The main research topics of the group are searches for generic gravitational waves transients (i.e searches for short-duration signals with minimal assumptions on the signal characteristics) and generation of squeezed light for Advanced Virgo:

- the Padova-Trento group participation in Virgo started with data analysis activities, focusing on searches for generic transient gravitational waves signals in LIGO and Virgo data. These searches offer major discovery opportunities, since they survey the entire sky and target signals from both well-known classes of sources (e.g. coalescences of Black Holes binaries), and yet unknown or less understood sources. The Padova-Trento group is leader in these searches and pursues them in close collaboration with LIGO e GEO groups.

- The participation of the Padova-Trento group in the Virgo instrumental science has grown over the years. It comprises investigations of thermal noise in optical coatings, realization of various devices for the detector mechanical suspensions and, from 2013, it focuses on the development of a squeezed light source for Advanced Virgo. The Padova-Trento group has a leading role in the latter project, which involves many Virgo groups. The effort benefits from the previous experience gained by GEO and LIGO groups, who first demonstrated that the use of squeezed light states can improve the detector sensitivity over a wide frequency range. Since 2016 the group also investigates the properties of thermal noise in non-equilibrium thermodynamic states.

The expertise of the Padova-Trento group includes detector design, cryogenics, inertial sensors, displacement transducers, very low noise electronics, mechanical losses and thermal noise, optical cavities, interferometry, detector commissioning and characterization, data analysis.


In Padova, University and INAF scientists pursue cutting-edge researches on observational astrophysics and cosmology. These activities include projects of particular relevance to Virgo, such as the search for electromagnetic counterparts of gravitational wave transients detected by LIGO and Virgo and the interpretation of multimessenger observations.