🔬 physics

From unit cell Geometry to Effective Acoustic Properties of Periodic Lattice Structures

This paper presents a geometry-informed framework that predicts the effective acoustic properties of simple cubic truss lattices by deriving key parameters from unit cell geometry and selecting an optimal airflow resistivity model, while also identifying limitations related to small unit cell sizes and additive manufacturing-induced surface roughness.

Tao Yang, Yu-Hao Chang, Mert Dogu, Mengtao Liang, Marcus Maeder, Steffen Marburg2026-08-27
🔬 physics

Resonant false vacuum decay in two dimensions on a 4000-qubit quantum annealer

Using a 4000-qubit quantum annealer to simulate a two-dimensional quantum Ising model, researchers demonstrated a distinct regime of false vacuum decay where local resonance conditions enable kinetically constrained, nearly ballistic domain growth that outpaces nucleation, revealing Kardar-Parisi-Zhang universality in nonequilibrium metastable dynamics.

Jaka Vodeb, Gregor Humar, Jean-Yves Desaules, Luka Pavešić, Marko Ljubotina, Zlatko Papic, Kristel Michielsen2026-08-26
🔬 physics

Extension of the Brophy Model for DC Discharge Ion Sources and its Application to Microwave Discharges Ion Engines

This paper extends the classic Brophy Model for DC discharge ion sources to microwave discharge systems, theoretically clarifying the mechanisms of efficient ion generation and electron emission in the neutralizers used by the Hayabusa missions while highlighting the critical role of material work function to promote global research and revitalization of microwave discharge ion engine technology.

Hitoshi Kuninaka2026-08-26
🔬 physics

Validation and Comparison of Coupled FSI Frameworks for High-Velocity Droplet Impact

This study validates and compares coupled fluid-structure interaction frameworks for high-velocity droplet impact against rigorous experimental data, demonstrating that while one-way coupled incompressible models suffice for pre-damage analysis, only two-way coupled compressible models accurately capture the full structural response and realistic pressure dynamics.

Luke Webb, Chennakesava Kadapa, Charles Burson-Thomas, Nikos Bempedelis, Wei Tan2026-08-26
🔬 physics

Testing a reduced model of transient inner-disk dynamics in magnetically arrested black-hole accretion

This paper demonstrates that a minimal reaction–diffusion reduced model, when driven by horizon magnetic flux and validated against phase-randomized surrogates, can successfully predict inner-disk connectivity in a specific stationary magnetically arrested black-hole accretion scenario, thereby proving that such low-cost closures can capture finite relaxation dynamics beyond simple memoryless limits.

Chang Soo Ko2026-08-26
🔬 physics

Electrically Tunable Selectivity Enhancement Overcomes the Permeability-Selectivity Trade-off in Two-dimensional Nanofluidic Channels

This study demonstrates that applying an external electric field to two-dimensional nanofluidic channels overcomes the traditional permeability-selectivity trade-off by reorienting ion hydration shells to boost salt rejection to 99.5% without compromising water flow, a mechanism validated across various ions and materials through molecular dynamics simulations.

Wanqi Zhou, Wanlin Guo, Hu Qiu2026-08-26
🔬 physics

Bound-State analysis of the Klein-Gordon equation with a generalized inverse quadratic Yukawa potential and position-dependent mass

This paper presents a bound-state analysis of the Klein-Gordon equation under a generalized inverse quadratic Yukawa potential with equal scalar and vector potentials, deriving energy constraints and physical admissibility conditions for both constant and position-dependent mass frameworks while retaining two distinct indicial exponent solutions at the origin.

Rashid Hafizov2026-08-26
🔬 physics

Universal Spectral Scaling and Hierarchical Organization in Atomic Spectra

This paper reveals that atomic spectra across 98 elements exhibit a universal, self-similar hierarchical organization governed by a single empirical frequency boundary (νmax\nu_{max}), where expressing spectral features in terms of this boundary collapses diverse observables into simple power-law scaling relations and uncovers a continuous spectral lineage that supersedes traditional atomic number-based indexing.

Abdennour Abbas2026-08-26