Hunting Dark Matter with Gamma Rays
![A simulated flux realization of Mrk 501, modeled across 25 logarithmically-spaced energy bins, demonstrates how the best-fit ECPL function [latex]H_0[/latex] is altered by the attenuation effect of dark photon scattering-specifically for a dark photon with a coupling of [latex]A^{\prime} = 1~\mathrm{eV}[/latex] and mixing parameter of [latex]\varepsilon = 5 \times 10^{-8}[/latex]-as detailed in Table 3.](https://arxiv.org/html/2602.21920v1/x6.png)
A new study explores how the Cherenkov Telescope Array could reveal the presence of dark photon dark matter by observing subtle distortions in high-energy light from distant sources.
Science
Unlocking Anderson Localization: How Ultracold Atoms Reveal Quantum Chaos
![The observed evolution of one-dimensional density profiles-specifically at energies of 166, 246, and 366 Hz following a five-second expansion-demonstrates the Anderson transition as the Fermi energy crosses the mobility edge at approximately 237 Hz, a phenomenon accurately predicted by the self-consistent theory (SCT) with parameters [latex]\alpha_{0}=4.29~\mathrm{s}^{-1/3}[/latex] and [latex]\beta=2.97~\mu\mathrm{m}~\mathrm{s}^{-1/3}[/latex], and further clarified by contrasting these profiles with those predicted under the simplifying assumption of a pure Bose-Einstein condensate.](https://arxiv.org/html/2602.22063v1/x6.png)
A new theoretical and experimental study uses ultracold atoms to probe the intricate dynamics of quantum transport as disorder drives a system towards complete localization.
Unlocking Topology with Reflections
![Exactly solvable free-fermion lattice models on a three-dimensional parameter space-defined by hopping terms characterized by [latex]m_{0}[/latex] and a vector [latex]\vec{m}=(m_{1},m_{2},m_{3})^{T}[/latex]-exhibit a nontrivial higher Berry phase under constraints formalized in equation (13), demonstrating a pathway to engineer topological properties within these systems.](https://arxiv.org/html/2602.21301v1/x2.png)
A new method reveals hidden topological properties in materials by analyzing how particles scatter at their edges.
From Quantum Foam to Spacetime: A New Emergent Gravity?
This review explores how quantum field theory might give rise to classical gravity, investigating the role of Planck constants in shaping spacetime itself.
From Quantum Foam to Familiar Skies: How the Universe Became Real
A new theoretical framework reveals how the transition from a quantum state to the classical spacetime we experience is driven by decoherence during the inflationary epoch.
Tuning Sound Waves: New Material Reveals Rich Phonon Dynamics
![The Raman spectra of [latex]\mathrm{InSiTe}_3[/latex] reveal polarization-dependent vibrational modes at both 80 K and 300 K, with the [latex]A_{1g}^{(3)}[/latex] mode exhibiting displacement patterns confined to silicon atoms and demonstrating that the material’s response is governed by interatomic forces, irrespective of crystallographic orientation relative to incident and scattered light.](https://arxiv.org/html/2602.20747v1/x2.png)
Researchers have discovered a way to generate and control a unique form of sound wave – a phonon frequency comb – within the layered material InSiTe3.
Beyond Plane Waves: Fixing Superposition in Multilayer Optics
![The distribution of input, reflection, transmission, and power imbalance across a single layer reveals frequency-ω and horizontal wavevector-[latex]k_x[/latex] dependencies, calculated using both standard and power modes within the outer medium, with discrepancies in power flux-quantified as [latex]\Delta z[/latex]-highlighting the nuanced energy transfer characteristics of the system.](https://arxiv.org/html/2602.20179v1/x8.png)
A new approach to modeling light propagation through complex materials resolves long-standing issues with energy conservation and wave superposition.
Quantum Shadows of Spinning Black Holes
![The study of a [latex]10^{6}\,M_{\odot}[/latex] black hole with a spin parameter of [latex]a/M = 0.9[/latex] reveals a logarithmic divergence in the gravitomagnetic AB phase as the inner arm radius approaches the outer horizon at approximately [latex]1.44\,r_{s}[/latex], with a characteristic flux cancellation and dip occurring when the inner and outer arm radii are equal, ultimately demonstrating the enormous magnitude-on the order of [latex]10^{22}[/latex] radians-of macroscopic gravitomagnetic flux in astrophysical black hole systems.](https://arxiv.org/html/2602.20337v1/x6.png)
New research reveals how the rotation of a black hole subtly alters the quantum behavior of superconducting materials.
Entangled States Under Pressure: A Holographic Discrepancy
![For a magnetic field strength of [latex]T=0.143[/latex] and a parameter [latex]C=35[/latex], the complex-valued quantity [latex]S_{A} \equiv \frac{4G_{N}^{(5)}}{V_{2}}S[/latex] exhibits a symmetry wherein its real and imaginary components remain invariant under the transformation [latex]i \rightarrow -i[/latex], indicating a specific relationship between its behavior across opposing field orientations.](https://arxiv.org/html/2602.20843v1/x4.png)
New research explores the limitations of using holographic duality to fully capture entanglement between quantum bits in the presence of magnetic fields.
Beyond Smooth Averages: Unveiling Hidden Structure in Complex Systems
![The study demonstrates that in a linear sigma model, the ratio [latex]GL[/latex] exhibits a temperature dependence affected by explicit breaking, with the interval defining the limits of reliability for mean-field theory and illustrating a pseudo-critical temperature’s relationship to this breaking parameter.](https://arxiv.org/html/2602.21095v1/x2.png)
A new theoretical framework moves past traditional mean-field approximations to reveal how spatial variations and interaction ranges shape the behavior of physical systems.