126 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.
This paper argues that the Third Law of thermodynamics is logically redundant because the Second Law already precludes the cycles at absolute zero that Einstein claimed necessitated an independent postulate, thereby positioning the Nernst heat theorem as a consistency regulator rather than a distinct physical discovery.
This paper proposes a variational framework that treats reheating as a constrained optimization problem to identify equation-of-state histories that extremize specific cosmological observables, demonstrating that different signals like gravitational waves and primordial black holes select distinct regions of post-inflationary expansion histories without relying on microscopic models.
This paper establishes a unified spectral perturbation theory that quantifies how various wall admittance mechanisms—such as porosity, viscosity, and roughness—modify compressible boundary-layer instability by deriving an explicit sensitivity law that separates wall physics from outer-mode dynamics and provides a phase criterion for stabilization.
This paper presents a low-cost, unified magnetic torsional pendulum equipped with a wireless gyroscope that enables undergraduate students to experimentally investigate and compare the dynamics of forced resonance, parametric resonance, and parametric amplification within a single physical system.
This paper establishes a predictive framework for the nonlinear mechanics and bifurcation behavior of multi-cell Kresling origami chains by systematically analyzing equilibrium branches across increasing layer counts, ultimately enabling the inverse design of programmable mechanical metamaterials through geometric control of critical points.
This study demonstrates that a gas diffusion electrode modified with 3% nano-octahedral Fe3O4 supported on Vulcan XC72 significantly enhances hydrogen peroxide generation and effectively degrades over 70% of endocrine-disrupting progestins (levonorgestrel and gestodene) in water through optimized solar and anodic-assisted electro-Fenton processes.
This study demonstrates that low-loading CeO and CeOMnO nanoparticles supported on Vulcan XC-72 carbon significantly enhance the selectivity and activity for sustainable hydrogen peroxide electrogeneration via the two-electron oxygen reduction reaction, with the 1% CeOMnO/C catalyst achieving up to 90% selectivity.
This paper presents an alternative method for solving several important classical mechanics problems by factorizing total mechanical energy using complex numbers, offering new exact and approximate analytical solutions suitable for undergraduate teaching.
This paper proposes a unified framework called "acoustic disguising" that utilizes immersive boundary conditions and Green's functions to seamlessly integrate acoustic cloaking, holography, and identity transformation into a single operation, as validated by 3D simulations and data-driven retrieval methods.
This paper introduces "variational openness" by relaxing the traditional fixed-boundary condition of Hamilton's principle, thereby deriving the Euler-Lagrange equations as a closed limit of a broader framework where boundary terms act as dynamical sources that can generate forcing, memory effects, and non-Markovian behavior.