6 papers

quant-ph2026

Van der Waals interaction at short and long distances: a pedagogical path from stationary to time-dependent perturbation theory

L. Saba, C. D. Fosco

The van der Waals interaction between neutral atoms is typically studied using stationary perturbation theory for the short-distance (London) limit, while long-distance (Casimir-Po…

cond-mat.mtrl-sci2026

Mechanical Scaling Laws and Deformation Behavior of Nanoporous Tantalum Microparticles

J. I. Ramallo, N. Vázquez von Bibow, M. A. Monclús +3

The mechanical scaling laws of dealloyed nanoporous metals depart from classical Gibson-Ashby predictions for open-cell foams due to a decreased connectivity in their solid network…

astro-ph.EP2026

Multifractal Signatures of Hamiltonian Chaos in Hyperion's Rotational Dynamics

S. Jaroszewicz, N. Mendez, Maria P. Beccar-Varela +1

The chaotic rotation of Saturn's moon Hyperion is a paradigmatic example of Hamiltonian chaos in a natural system. Although its tumbling motion is well established theoretically, i…

q-bio.PE2026

Logistic dynamics of small populations with demographic stochasticity

Lucas M. Brugevin, Damián H. Zanette

We study an ecology-inspired model for a population of bounded size, whose dynamics is governed by random birth, death, and immigration events. Stochastic fluctuations in the numbe…

hep-ph2026

Finite-Size Effects on the Critical End Point of Magnetized Quark Matter in the Nonlocal PNJL Model

G. Lugones, S. A. Ferraris, A. G. Grunfeld

We investigate finite-size effects in the - phase diagram of magnetized quark matter within the framework of a nonlocal extension of the Polyakov--Nambu--Jona-Lasinio (PNJL)…

cond-mat.stat-mech2026

MF-toolkit: A High-Performance Python Library for Multifractal Analysis with Automated Crossover Detection, Source Identification and Application to Gravitational Waves Data

Nahuel Mendez, Maria Cristina Mariani Maria Pia Beccar-Varela, Osei Tweneboah +1

Multifractal Detrended Fluctuation Analysis (MFDFA) is a powerful and widely used technique for characterizing the scaling properties and long-range correlations of complex time se…