Ghost Particles, Real Physics: The Hunt Beyond the Standard Model
Next-generation neutrino experiments are poised to unlock the secrets of these elusive particles and challenge our fundamental understanding of the universe.
Science
String Clouds and Quantum Shadows: A New Look at Black Hole Interiors
![For a conserved angular momentum of [latex]L=1[/latex] and a simplified unit black hole mass, the effective potential governing photon dynamics shifts as radial distance varies, subtly dictating the paths these particles will take around the massive object.](https://arxiv.org/html/2602.22928v1/2602.22928v1/x24.png)
Researchers are exploring how quantum effects and exotic matter configurations within black holes could alter their fundamental properties and potentially reveal new observational signatures.
Black Hole Horizons and the Dance of Phase Transitions
![The coexistence lines delineate phase transitions between low- and high-entropy states within a conformal field theory thermal ensemble, demonstrating that for given parameters [latex]R=1[/latex], [latex]\gamma=0.6[/latex], and varying [latex]C[/latex] or [latex]Q[/latex], these transitions manifest as first-order phase changes separated by critical points at specific values of [latex]q[/latex], [latex]Q[/latex], and temperature [latex]T[/latex].](https://arxiv.org/html/2602.21930v1/x12.png)
New research explores how gravity and quantum fields intertwine to create rich phase behavior in the extreme environments around black holes.
Beyond the Singularity: Can String Theory Resolve Black Hole Evaporation?
![Black hole entropy, when refined by metaparticle corrections and expressed in Planck units as a function of mass [latex] \tilde{M} [/latex], exhibits logarithmic deviations from the standard Bekenstein-Hawking formula, with the degree of this deviation governed by the metaparticle duality parameter [latex] \tilde{\mu} [/latex] and most pronounced for smaller black hole masses.](https://arxiv.org/html/2602.21407v1/metaparticle_entropy_vs_mass.png)
New research suggests that a framework built on metastrings and metaparticles offers a path towards understanding black hole evaporation that avoids the problematic information paradox and results in a stable remnant.
Spinning Down Dark Matter: The Fate of Primordial Black Holes
New research explores how quantum effects and tidal forces influence the spin and potential observability of primordial black holes considered as dark matter candidates.
Unlocking Neutrino Secrets: The Next Generation of Experiments
Upcoming long-baseline experiments like DUNE and T2HK promise to deliver unprecedented precision in our understanding of neutrino behavior.
Unveiling Hidden Order in Quantum Magnets with Machine Learning
Researchers have successfully used an unsupervised learning framework to identify a critical point within a complex quantum system, offering new insights into the behavior of frustrated magnetic materials.
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.
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.