🔬 physics

Gravitational-Wave Echoes from a Hayward Black Hole under Minimal Geometric Deformation

This paper demonstrates that applying a minimal geometric deformation to a regular Hayward black hole generates an exact, curvature-regular spacetime where the odd-parity gravitational-wave effective potential naturally evolves into a multi-barrier structure, creating a self-contained trapping cavity that produces gravitational-wave echoes without requiring external reflecting surfaces.

Owais Farooq Dar2026-07-13
🔬 physics

Physics-Informed Machine Learning for Predicting Buckling Performance and Damage Evolution in Graphene Reinforced Basalt/Epoxy Composites

This study presents an integrated experimental and computational framework demonstrating that dual-phase reduced graphene oxide functionalization significantly enhances the mechanical and buckling performance of basalt/epoxy composites, while leveraging multiscale modeling and machine learning to accurately predict critical loads and damage evolution for optimized structural design.

UMANG DUBEY, K Panneerselvam2026-07-10
🔬 physics

Resolving the aragonite (CaCO3) superstructure paradox

This study resolves the long-standing aragonite superstructure paradox by demonstrating that mysterious symmetry-forbidden reflections, previously mistaken for new CaCO3 polytypes, are actually diffraction artifacts caused by nanoscale polysynthetic twinning, a finding validated through modeling and experiments that offers a generalized framework for identifying similar artifacts in other twinned materials.

Vesna Ribić, Zsombor Molnár, Péter Pekker, Péter Németh, István Dódony, Mihály Pósfai, Pavel Gavryushkin, Aleksander Reč (…)2026-07-10✓ Author reviewed
🔬 physics

Beyond Single-Copy Quantum Measurements: Ensemble Structure Enables Basis Discrimination

This paper demonstrates that while ensembles of qubits prepared in either the computational or Hadamard basis are indistinguishable via single-copy measurements due to identical maximally mixed reduced states, a graph-state protocol leveraging multi-copy statistical correlations can successfully discriminate between these basis families, a result experimentally validated on the IBM Fez quantum processor with high accuracy.

Amitava Datta2026-07-10
🔬 physics

Stability-Based Optimization of Planar Quiet Wind Tunnel Nozzles: Two-Dimensional Design and Three-Dimensional Assessment

This study demonstrates that while two-dimensional stability-based optimization effectively suppresses instabilities on the top wall of planar quiet wind tunnel nozzles, reliable design requires three-dimensional assessment to account for sidewall-induced crossflow disturbances that the planar model fails to capture.

Alberto Testa, Pierre Schrooyen, Johan Steelant, Thierry Magin, Guillaume Grossir2026-07-10
🔬 physics

Theoretical Analysis of the Energy Cascade in Quantum Turbulence: From Richardson–Kolmogorov Eddies to Kelvin Waves

This paper presents a comprehensive theoretical analysis of the energy cascade in quantum turbulence, tracing the transfer of energy from macroscopic Richardson–Kolmogorov eddies through the inter-vortex bottleneck to microscopic Kelvin-wave cascades and dissipation, while examining the roles of vortex reconnection, competing cascade models, and finite-temperature mutual friction effects.

Abishek Mahalingam2026-07-10
🔬 physics

Fabrication and Electrical Characterization of Radio Frequency Magnetron Sputtered Al₂O₃ Thin-Film Metal–Insulator–Metal Capacitors on Platinized Silicon

This study demonstrates the successful fabrication and characterization of high-quality Metal-Insulator-Metal capacitors using 60 nm RF magnetron sputtered Al₂O₃ thin films on platinized silicon, which exhibit smooth morphology, negligible leakage current, and stable dielectric properties suitable for electronic applications.

Abdullah2026-07-10