Giovanni Carapella

Electrical transport and low-frequency noise in MoS 2 field-effect transistors under controlled gas atmospheres

Filippo Giubileo, C. Barone, M. Passacantando, Francesco Romeo et autres

Abstract Two-dimensional semiconductors, and particularly MoS 2 , are promising active materials for room-temperature gas sensing devices because their channel conductance is strongly modulated by surface adsorption. Here we report a systematic study of the electrical transport properties of back-gated MoS 2 …

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Directional search for persistent gravitational waves: Results from the first part of LIGO-Virgo-KAGRA’s fourth observing run

Adrian Abac, I. Abouelfettouh, F. Acernese, K. Ackley et autres

The angular distribution of gravitational-wave power from persistent sources may exhibit anisotropies arising from the large-scale structure of the Universe. This motivates directional searches for astrophysical and cosmological gravitational-wave backgrounds, as well as continuous-wave emitters. We present results of such a search …

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The Science of the Einstein Telescope

Einstein Telescope collaboration, Adrian Abac, Raul Abramo, Simone Albanesi et autres

GWTC-4.0: An Introduction to Version 4.0 of the Gravitational-Wave Transient Catalog

Adrian Abac, I. Abouelfettouh, F Acernese, K. Ackley et autres

Abstract The Gravitational-Wave Transient Catalog (GWTC) is a collection of short-duration (transient) gravitational-wave signals identified by the LIGO–Virgo–KAGRA Collaboration in gravitational-wave data produced by the eponymous detectors. The catalog provides information about the identified candidates, such as the arrival time and amplitude …

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Comparative Analysis of Thermal Models for Test Masses in Next-Generation Gravitational Wave Interferometers

V. Pierro, V. Fiumara, Guerino Avallone, Giovanni Carapella et autres

Accurate thermal modeling of Terminal Test Masses (TTMs) is crucial for optimizing the sensitivity of gravitational wave interferometers like Virgo. In fact, in such gravitational wave detectors even minimal laser power absorption can induce performance-limiting thermal effects. This paper presents a detailed …

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Directed searches for gravitational waves from ultralight vector boson clouds around merger remnant and galactic black holes during the first part of the fourth LIGO-Virgo-KAGRA observing run

The LIGO Scientific Collaboration, the KAGRA Collaboration, K. Ackley, S Adhicary et autres

We present the first directed searches for long-transient and continuous gravitational waves from ultralight vector boson clouds around known black holes (BHs). We use LIGO data from the first part of the fourth LIGO-Virgo-KAGRA observing run. The searches target two distinct types …

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Upper Limits on the Isotropic Gravitational-Wave Background from the first part of LIGO, Virgo, and KAGRA's fourth Observing Run

The LIGO Scientific Collaboration, the KAGRA Collaboration, Adrian Abac, I. Abouelfettouh et autres

We present results from the search for an isotropic gravitational-wave background using Advanced LIGO and Advanced Virgo data from O1 through O4a, the first part of the fourth observing run. This background is the accumulated signal from unresolved sources throughout cosmic history …

All-sky search for long-duration gravitational-wave transients in the first part of the fourth LIGO-Virgo-KAGRA Observing run

The LIGO Scientific Collaboration, the KAGRA Collaboration, Adrian Abac, I. Abouelfettouh et autres

We present an all-sky search for long-duration gravitational waves (GWs) from the first part of the LIGO-Virgo-KAGRA fourth observing run (O4), called O4a and comprising data taken between 24 May 2023 and 16 January 2024. The GW signals targeted by this search …

Search for Gravitational Waves Emitted from SN 2023ixf

Adrian Abac, R. Abbott, I. Abouelfettouh, F. Acernese et autres

Abstract We present the results of a search for gravitational-wave transients associated with core-collapse supernova SN 2023ixf, which was observed in the galaxy Messier 101 via optical emission on 2023 May 19, during the LIGO–Virgo–KAGRA 15th Engineering Run. We define a five-day …

Effect of a second-harmonic current–phase relation on the behavior of a Josephson traveling-wave parametric amplifier

Claudio Guarcello, C. Barone, Giovanni Carapella, Giovanni Filatrella et autres

We numerically investigate the behavior of a Josephson traveling-wave parametric amplifier assuming a current–phase relation with a second-harmonic contribution. We find that varying the weight of harmonic terms in the Josephson current affects the gain profile. The analysis of gain characteristics, phase-space …

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Search for Continuous Gravitational Waves from Known Pulsars in the First Part of the Fourth LIGO-Virgo-KAGRA Observing Run

Adrian Abac, Robert E. Abbott, I. Abouelfettouh, F Acernese et autres

Abstract Continuous gravitational waves (CWs) emission from neutron stars carries information about their internal structure and equation of state, and it can provide tests of general relativity. We present a search for CWs from a set of 45 known pulsars in the …

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Gadolinium-Doped Ceria Room-Temperature Sputtered Thin Barrier Layers in Large-Area Solid Oxide Fuel Cells: Influence of Their Thickness and Thickness Gradient on the Cathodic Processes

Hafiz Sami Ur Rehman, Nunzia Coppola, Arpana Singh, Pierpaolo Polverino et autres

High Resolution Image Download MS PowerPoint Slide Understanding the intricate electrochemical processes in solid oxide fuel cell (SOFC) components, especially air electrodes, is crucial for enhancing device performance and durability. In this work, following recent results showing important improvements in the electrochemical …

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