M. G. Castellano
A5089536701- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Superconducting and THz Device Technology
- Quantum Information and Cryptography
- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Geophysics and Gravity Measurements
- Advanced Thermodynamics and Statistical Mechanics
- stochastic dynamics and bifurcation
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Nonlinear Dynamics and Pattern Formation
- Quantum Computing Algorithms and Architecture
- Cosmology and Gravitation Theories
- Spectroscopy and Quantum Chemical Studies
- Astrophysics and Cosmic Phenomena
- Thermal Radiation and Cooling Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Particle physics theoretical and experimental studies
- Semiconductor Quantum Structures and Devices
- Gamma-ray bursts and supernovae
- Mechanical and Optical Resonators
Astronomical Observatory of Rome
2023
University of Cambridge
2023
National Institute for Astrophysics
1988-2023
Istituto di Fotonica e Nanotecnologie
2012-2021
Center for Biomolecular Nanotechnologies
2014-2019
National Research Council
2019
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
1992-2017
Istituto Nazionale di Fisica Nucleare
1987-2006
Sapienza University of Rome
2003-2006
University of L'Aquila
2006
We forecast the main cosmological parameter constraints achievable with CORE space mission which is dedicated to mapping polarisation of Cosmic Microwave Background (CMB). was recently submitted in response ESA's fifth call for medium-sized proposals (M5). Here we report results from our pre-submission study impact various instrumental options, particular telescope size and sensitivity level, review great, transformative potential as proposed. Specifically, assess on a broad range...
We describe the cryogenic resonant gravitational wave detector of Rome group, named Explorer, and report on its long term operation with sensitivity for short bursts in range $h\ensuremath{\simeq}7\ensuremath{-}10\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}19}$. Explorer has mass $M=2270$ kg is equipped a capacitive transducer followed by dc superconducting quantum interference device amplifier. It been operated at $T\ensuremath{\simeq}2.6$ K cryostat cooled superfluid helium. With...
We describe a space-borne, multi-band, multi-beam polarimeter aiming at precise and accurate measurement of the polarization Cosmic Microwave Background. The instrument is optimized to be compatible with strict budget requirements medium-size space mission within Vision Programme European Space Agency. has no moving parts, uses arrays diffraction-limited Kinetic Inductance Detectors cover frequency range from 60 GHz 600 in 19 wide bands, focal plane 1.2 m aperture telescope cooled 40 K,...
The development of wide-area cryogenic light detectors with good energy resolution is one the priorities next generation bolometric experiments searching for rare interactions, as simultaneous read-out and heat signals enables background suppression through particle identification. Among proposed technological approaches phonon sensor, naturally-multiplexed Kinetic Inductance Detectors (KIDs) stand out their excellent intrinsic reproducibility. To satisfy large surface requirement (several...
In this paper the authors report different experiences in use of board games as learning tools for complex and abstract scientific concepts such Quantum Mechanics, Relativity or nano-biotechnologies. particular we describe “Quantum Race”, designed introduction Mechanical principles, “Lab on a chip”, concerning immune system nano-biotechnologies, “Time created to explain Relativistic time dilation. The main idea is choose core few basic be explained, design game mechanisms rules completely...
We report on the first cryogenic test at ultralow temperature of new gravitational-wave antenna "Nautilus" Rome group. The 2390 kg Al 5056 cylindrical-bar has been cooled to a 95 mK.
We report on the performance of lumped-elements Kinetic Inductance Detector (KID) arrays for mm and sub-mm wavelengths, operated at 0.3 K during stratospheric flight OLIMPO payload, an altitude 37.8 km. find that detectors can be tuned in-flight, their is robust against radiative background changes due to varying telescope elevation. also noise equivalent power in smaller by a factor ∼ 2, 8, 3.5, 4.5 150, 250, 350 460 GHz relative one measured laboratory, close our calculated...
The 2-point correlation function of the galaxy spatial distribution is a major cosmological observable that enables constraints on dynamics and geometry Universe. Euclid mission aims at performing an extensive spectroscopic survey approximately 20--30 million H$\alpha$-emitting galaxies up to about redshift two. This ambitious project seeks elucidate nature dark energy by mapping 3-dimensional clustering over significant portion sky. paper presents methodology software developed for...
The mission is generating a vast amount of imaging data in four broadband filters at high angular resolution. This will allow for the detailed study mass, metallicity, and stellar populations across galaxies that constrain their formation evolutionary pathways. Transforming large samples into maps physical parameters an efficient reliable manner outstanding challenge. Here, we investigate power reliability machine learning techniques to extract distribution within well-resolved galaxies. We...
We have measured the rate of thermally induced escape from zero-voltage state in long Josephson junctions both overlap and in-line geometry as a function applied magnetic field. The statistical distribution switching currents is used to evaluate derive an activation energy $\ensuremath{\Delta}U$ for process. Because correspond continuum limit multidimensional systems, principle difference between stationary states infinite-dimensional potential. obtain good agreement calculated energies with...
The data recorded by the Rome room temperature gravitational-wave antenna during Supernova SN 1987a have been analysed in connection with Mont Blanc neutrino event. An energy innovation is observed which precedes (1.4 ± 0.5) s first arrival time probability of being accidental 3 per cent. estimation emitted as g.w. distributed over 4π and a frequency bandwidth 1 kHz gives figure 2400 M⊙, abnormal according to standard views on Under hypothesis that delay δt between signal detected tunnel due...
We investigate, by experiments and numerical simulations, thermal activation processes of Josephson tunnel junctions in the presence microwave radiation. When applied signal resonates with plasma frequency oscillations, switching current may become multivalued a temperature range far exceeding classical to quantum crossover temperature. Plots currents traced as function show very good agreement functional forms expected from dependencies on bias current. Throughout, simulations corresponding...
The development of sensitive cryogenic light detectors is primary interest for bolometric experiments searching rare events like dark matter interactions or neutrino-less double beta decay. Thanks to their good energy resolution and the natural multiplexed read-out, Kinetic Inductance Detectors (KIDs) are particularly suitable this purpose. To efficiently couple KIDs-based large crystals used by most advanced detectors, active surfaces several cm2 needed. For reason, we developing...
We discuss the potential of a next generation space-borne Cosmic Microwave Background (CMB) experiment for studies extragalactic sources. Our analysis has particular bearing on definition future space project, CORE, that been submitted in response to ESA's call Medium-size mission opportunity as successor Planck satellite. Even though effective telescope size will be somewhat smaller than Planck, CORE have considerably better angular resolution at its highest frequencies, since, contrast...
Superconducting meanders of NbN thin films have applications as single-photon detectors with high sensitivity in the infrared region. We report here a detailed analysis electrical characteristics such meanders, by studying structures where each wire meander is separately contacted. The effect heating on superconducting-normal transition adjacent stripes evidenced. Moreover, switching current distribution highlights high-critical uniformity achieved our process.
We experimentally demonstrate coherent oscillations of a tunable superconducting flux qubit by manipulating its energy potential with nanosecond-long pulse magnetic flux. The occupation probabilities two persistent current states oscillate at frequency ranging from 6 GHz to 21 GHz, changing the amplitude pulse. demonstrated operation mode could allow quantum gates be realized in less than 100 ps, which is much shorter gate times attainable other qubits. Another advantage this type immunity...