physics.class-ph papers

This collection explores the fundamental physics concepts that govern how matter and energy interact across the universe. From the invisible forces shaping our daily lives to the complex mechanics driving cosmic phenomena, these studies reveal the underlying rules of reality. Here, we translate cutting-edge research into insights anyone can understand, bridging the gap between abstract theory and tangible discovery.

Every new preprint in this category originates from arXiv, where researchers first share their latest findings with the global community. At Gist.Science, we process each of these submissions to provide both detailed technical summaries and clear, plain-language explanations. This dual approach ensures that whether you are a seasoned physicist or a curious learner, you can grasp the significance of every breakthrough without getting lost in dense equations.

Below are the latest papers in Class-Ph, freshly processed and ready for you to explore.

From Mass-Shell Factorisation to Spin: An Attempt at a Matrix-Valued Liouville Framework for Relativistic Classical and Quantum Phase-Spacetime

This paper proposes that spinor structure and spin algebra naturally emerge in relativistic statistical mechanics by formulating the theory on phase spacetime with a first-order description that retains both mass-shell branches, leading to a matrix-valued distribution function that unifies classical transport equations with the Dirac-Wigner formulation through deformation quantisation.

Mark J. Everitt2026-05-19⚛️ quant-ph

Variational Openness

This paper introduces "variational openness" as a conservative extension of classical variational principles that unifies bulk and boundary stationarity by requiring the cancellation of total first variation rather than separate contributions, thereby enabling the analysis of regulated systems where bulk and boundary displacements are linked through compatibility operators and revealing critical thresholds for stability loss via a projected Rayleigh–Ritz criterion.

Francisco Monroy2026-05-19🔢 math-ph

Variational Boundary Fluctuations as a First-Principles Origin of Langevin Noise

This paper proposes a first-principles derivation of Langevin noise by demonstrating that fluctuations in the boundary data of Hamilton's principle induce state-dependent, multiplicative stochastic forces through the gradient of the on-shell action, with homogeneous additive noise emerging only as a specific Markovian limit.

Francisco Monroy2026-05-19🔬 cond-mat

Simulation of S-parameters of general multilayer boxed PCBs with the method of moments and the scattering matrix algorithm

This paper presents a numerically stable Method of Moments tool for simulating S-parameters of multilayer boxed PCBs by combining an S-matrix formalism to derive the complete dyadic Green's function with various basis functions to model both transverse and longitudinal currents.

A. O. Makarenko, P. Zheglova, R. Gaponenko, R. V. Salimov, R. I. Tikhonov, A. A. Shcherbakov2026-05-19🔬 physics.app-ph

Bayesian characterization of porous media using three-microphone tube method in extended frequency ranges

This paper presents a Bayesian inference approach applied to a three-microphone tube method with circumferential microphone distribution to resolve phase jumps and accurately estimate the characteristic impedance and propagation coefficient of porous media across extended frequency ranges.

Ziqi Chen, Ning Xiang2026-05-19🔬 physics

On the Essence of Lagrange's Equations

This paper rederives Lagrange's equations by applying the chain rule to establish the intrinsic link between the kinetic energy and momentum theorems, revealing that the equations fundamentally represent the transformation of energy conservation into momentum conservation through coordinate-dependent generalized forces and displacements.

Peng Shi2026-05-18🔬 physics

Efficiency in a repetitive pulse magnet

This paper analytically demonstrates that minimizing the dimensions of a repetitive-pulse magnet coil optimizes its efficiency, enabling higher repetition rates and more intense magnetic fields by revealing a complex interplay between geometric parameters and performance metrics like energy loss and pulse duration.

Akihiko Ikeda, Yuto Ishii, Yasuhiro H. Matsuda, Go Yumoto, Ayumi Abe, Ryusuke Matsunaga2026-05-15🔬 physics.app-ph

On the Anticipation of Lunar Travel in the Early 20th Century: A Pedagogical Exercise

This paper analyzes Alphonse Berget's 1923 popular science work *Le Ciel* to demonstrate how his Newtonian-based, semi-quantitative predictions of Earth-Moon travel—covering trajectory phases, human factors, and an estimated 49-hour transit time—offer a historically significant and pedagogically valuable synthesis of early 20th-century astrodynamics that remarkably anticipates modern spaceflight concepts.

Tina A. Harriott, Cherif F. Matta2026-05-14🔬 physics

Acoustic Chirality

This paper establishes chirality as a fundamental property of elastic waves by revealing a new continuous symmetry and conservation law in linear isotropic elasticity, distinguishing between integral chirality driven by transverse phonon imbalance and local chirality involving both transverse and longitudinal components, while introducing related concepts of acoustic helicity and "false chirality."

Alex J. Vernon, Konstantin Y. Bliokh2026-05-14🔬 physics

Harnessing Nonlinear Dynamics for Time-Driven Berry Phase in Classical Systems

This study demonstrates that a classical nonlinear system of two spherical granules can exhibit time-driven Berry phases mirroring quantum phenomena, revealing a rich spectrum of vibrational modes and multiple nontrivial topological signatures influenced by driving forces and precompression.

Kazi T. Mahmood, M. Arif Hasan2026-05-13🔬 cond-mat.mes-hall

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