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10 papers

astro-ph.IM2026

LIGO A: Detector Design and Science Prospects Beyond A+

L. Sun, K. Kuns, B. J. J. Slagmolen +1153

We present the LIGO A detector concept, an upgrade for the LIGO observatories based on room-temperature interferometers beyond the fifth observing run (O5). Building on th…

gr-qc2026

Advanced Virgo during the LIGO-Virgo-KAGRA fourth observing run

Virgo Collaboration, F Acernese, A Agapito +546

The paper reports on Advanced Virgo's participation in the fourth observing run (O4) of the global gravitational‑wave detector network, describing the commissioning of its new sign…

astro-ph.IM2026

Improving Beam Quality in Gravitational-Wave Interferometers Illuminated by Higher-Order Laguerre-Gaussian Modes

Liu Tao, Yuefan Guo, Alberto Gatto +5

Higher-order Laguerre-Gaussian (LG) laser modes have been proposed to reduce test-mass thermal noise in laser interferometric gravitational-wave detectors, owing to their more homo…

cond-mat.mtrl-sci2026

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-…

physics.optics2026

Elastic and structural anisotropy in silica thin films for gravitational-wave detectors

Brenda Bracco, Michele Magnozzi, Stefano Colace +11

The thermal noise of mirror coatings for gravitational-wave detectors critically depends on the elastic properties of the constituent materials. Data analyses and theoretical model…

physics.optics2026

Thermal Noise Reduction in Ternary Optical Coatings: From Ti::GeO-Based Ternary Systems to High Index Materials

Vincenzo Pierro, Guerino Avallone, Jessica Steinlechner +11

Minimizing coating thermal noise is crucial for enhancing gravitational wave detector sensitivity, with a target Amplitude Spectral Density Reduction Factor (ASD RF) of relat…