Unmasking Hidden Magnetism with Kondo Impurities
![The study of the two-impurity Kondo model examines the Fermi surface of an underlying Anderson metal-specifically, a system where [latex] t^{\prime} = 0.4 [/latex]-to understand the complex interactions arising from localized magnetic moments within a conductive host.](https://arxiv.org/html/2601.07138v1/x1.png)
New research utilizes spin-resolved scanning tunneling microscopy and quantum Monte Carlo simulations to probe the subtle interplay between Kondo effects and unconventional altermagnetic states.
Science
Do AI Models Think Like Quantum Systems?
A new analysis challenges claims of genuine quantum behavior in large language models, suggesting observed patterns may reflect contextual similarities rather than fundamental physics.
Beyond Cause and Effect
New research challenges the fundamental role of causality in physics, suggesting it may be an emergent property rather than a core law of the universe.
The Hunt for Shadows: New Limits on Dark Matter Interactions
![The study establishes exclusion limits on the signal strength μ-defined as the ratio of signal to theoretical prediction-across a range of hypothetical dark matter mediator masses ([latex]m_{Z^{\prime}}[/latex]) and dark matter particle masses ([latex]m_{\chi}[/latex]) within a modified Higgs doublet model, demonstrating that parameter combinations yielding larger values of μ are increasingly constrained by observed data, with the 95% confidence level boundary defined by the black solid line and expected boundaries indicated by dashed and dotted lines.](https://arxiv.org/html/2601.06284v1/x11.png)
Recent results from the CMS experiment at the Large Hadron Collider offer the latest constraints on potential interactions between dark matter and the visible universe.
The Quantum Observer: How Reality Takes Shape
A new perspective on quantum mechanics proposes that the wave function doesn’t describe what is, but rather the potential from which reality emerges through observation.
Beyond the Fabric: A Quantum Algebra for Spacetime
A new mathematical framework proposes that spacetime itself emerges from the algebraic properties of a quantum structure, potentially reconciling gravity with quantum mechanics.
Beyond the Standard Model: Hunting for Dark Matter in Pion Decay
![The PIENU experiment predicts the expected detection rate of [latex]\pi^{+}\to\mu^{+}\nu_{\mu}X[/latex] decays as a function of muon kinetic energy, demonstrating how varying the mass of the undetected particle <i>X</i> impacts signal prediction, with analyses at both low and high energies-corresponding to branching ratios of [latex]3\times 10^{-5}[/latex] and [latex]6\times 10^{-5}[/latex]-yielding results consistent with previously extracted residuals.](https://arxiv.org/html/2601.06254v1/x27.png)
A new analysis details how upcoming experiments leveraging pion decays could reveal the existence of sterile neutrinos and other particles composing the universe’s hidden dark sector.
Entropic Memory in 3D Gauge Theory Defies Symmetry Breaking
New research reveals that three-dimensional Z2 lattice gauge theory exhibits a surprising robustness to symmetry breaking, driven by entropic effects that create a ‘classical memory’.
Squeezing Insights from Neutron Stars to Map Nuclear Forces
![Analysis of astrophysical data - incorporating gravitational-wave observations, maximum-mass constraints, and NICER results - refines prior estimates derived from nucleon-nucleon scattering, yielding updated posterior distributions for the six spectral LECs governing neutron matter, and further projecting anticipated sensitivities achievable with third-generation detectors for symmetric binary systems with component masses of [latex]1.0\,M_{\odot}[/latex] and [latex]1.4\,M_{\odot}[/latex].](https://arxiv.org/html/2601.05999v1/d7_current_injection.png)
New research leverages neutron star observations and machine learning to refine our understanding of the fundamental interactions governing matter at extreme densities.
Black Hole Secrets: Preserving Information in the Quantum Foam
New research offers a microscopic view of black hole evaporation, suggesting information isn’t lost but encoded in subtle quantum entanglement.