Where Gravity Meets the Quantum Realm
A new framework leveraging corner symmetries offers a path toward constructing a consistent theory of quantum gravity and resolving long-standing paradoxes.
Science
Beyond Space: Unveiling Temporal Entanglement in Quantum Fields
New research establishes a surprising link between entanglement in time and the more familiar phenomenon of spatial entanglement in quantum field theory.
Beyond Singularities: Harnessing Nonlinearity at Exceptional Points
This review explores how the convergence of nonlinearity and exceptional points is unlocking new physics and paving the way for advanced wave-based technologies.
Beyond Equilibrium: Engineering Materials with Quantum Measurement
![Electronic systems at finite temperatures are understood through two distinct frameworks: a conventional Hamiltonian-based approach, which describes states as thermally populated energy eigenstates [latex]\vert n \rangle[/latex] with energies [latex]E_n[/latex] and utilizes a density matrix ρ to account for temperature, and a quantum-trajectory approach, appropriate when inelastic scattering dominates, wherein temperature dictates trap occupancy and detrapping rates, leading to non-eigenstate trajectories and a qualitatively different thermal ensemble.](https://arxiv.org/html/2603.21769v1/Fig_B.png)
A new theoretical framework proposes harnessing the power of quantum measurement to design materials with properties inaccessible through conventional, Hamiltonian-based approaches.
Dark Matter’s Hidden Interactions: A Lattice QCD Probe
![The study investigates the scattering cross-sections for pseudo-Nambu-Goldboson (pNGB) dark matter particles-assumed to have a mass of 100 MeV-interacting with nucleons, specifically analyzing the [latex]10[/latex] and [latex]14[/latex] channels of the [latex]Sp(4)[/latex] symmetry group, and presenting results-for the [latex]14[/latex] channel-derived from prior work [11], with uncertainties represented through shaded regions surrounding central values depicted as solid, dashed, and dot-dashed lines.](https://arxiv.org/html/2603.19557v1/x6.png)
New simulations explore how self-interacting dark matter particles within a specific theoretical framework might reveal themselves through resonant states.
What Models *Really* Understand: Beyond Surface-Level Awareness
New research challenges the notion that large language models possess genuine contextual understanding, suggesting that observed ‘evaluation awareness’ may be a result of sensitivity to prompt structure.
Mapping the Universe with 21cm Signals: A New Precision Era
![The two-dimensional correlation function [latex]\xi_{\rm 21cm}[/latex]-calculated using Eq. (10)-demonstrates how varying the beam size [latex]R_{\rm beam}[/latex] (from 0 to 38.45 [latex]\mathrm{Mpc}\,h^{-1}[/latex]) and foreground wavenumber [latex]k_{\rm fg}[/latex] (from 0 to 0.0419 [latex]\mathrm{Mpc}^{-1}h[/latex]) shapes the observed signal, revealing the delicate interplay between resolution and sensitivity in mapping the distribution of neutral hydrogen.](https://arxiv.org/html/2603.19832v1/new_figures/2DCF.png)
Researchers are refining techniques to extract subtle patterns from 21cm radiation, promising a more detailed understanding of the universe’s expansion history.
Beyond Protons and Neutrons: Unveiling the Secrets of Quarkyonic Matter
![In symmetric nuclear matter, quark momentum distributions-calculated using the quarkyonic Quantum Monte Carlo model for a density parameter of [latex] r_p = 0.7 [/latex] fm-exhibit a shift at densities exceeding saturation, indicating full occupation of low-momentum quark states and reflecting the underlying many-body physics of nucleon interactions.](https://arxiv.org/html/2603.19839v1/x1.png)
New research explores the exotic state of matter where quarks become dominant, bridging the gap between traditional nuclear physics and the realm of quark-gluon plasmas.
Unlocking Nuclear Secrets with the Hyperfine Anomaly
![The magnetic moments of [latex]^{39}K[/latex] and [latex]^{47}K[/latex] are constrained by experimental hyperfine anomalies and theoretical calculations incorporating both one- and two-body currents, revealing the interplay between spin and orbital angular momentum contributions to their magnetic properties.](https://arxiv.org/html/2603.20090v1/x3.png)
A new study leverages subtle magnetic interactions to probe the internal structure of short-lived potassium isotopes, revealing discrepancies in predicted nuclear spin contributions.
Engineering Robust States with Dissipation
![Deterministic control over topological corner modes is demonstrated through the manipulation of edge terminations in a hybrid system, where altermagnetic anisotropy induces dissipative potentials that shift corner localization-an effect quantified by effective dissipation rates of [latex]\overline{\gamma}\_{1}\sim eq 0.4\gamma\sigma\_{z}[/latex] and [latex]\overline{\gamma}\_{2}\sim eq 0.7\gamma\sigma\_{z}[/latex]-and vanishes in the conventional antiferromagnetic limit, as evidenced by spatial profiles obtained under open boundary conditions with parameters [latex]\lambda=1.2[/latex] and [latex]J=1[/latex].](https://arxiv.org/html/2603.19378v1/x5.png)
New research demonstrates how controlled energy loss in a unique material class, altermagnets, can be harnessed to create and manipulate highly stable electronic states.