New matter-wave interferometry experiments reveal the full distribution of order parameter fluctuations in two-dimensional Bose gases, providing insights into universal behavior at the BKT transition and non-equilibrium dynamics.
A new theoretical model explores a universe that avoided a singularity by ‘bouncing’ from a contracting phase, offering a potential solution to the Hubble tension and insights into the earliest moments of existence.
![The layout of the MUon Science Establishment at J-PARC, as detailed in reference [Kawamura:2018apy], provides the infrastructure necessary for advanced research utilizing muons-elementary particles crucial for investigating fundamental physics and material science.](https://arxiv.org/html/2601.15818v1/muse.png)
Advances in muon beam technology are opening unprecedented avenues for exploring fundamental physics, from probing the structure of matter to searching for new particles and interactions.
A new theoretical framework provides a comprehensive method for analyzing entanglement in the decay of particle-antiparticle pairs, paving the way for precision measurements in high-energy physics.
![The study demonstrates that the significance of quantum effects at the Deep Underground Neutrino Experiment (DUNE) diminishes as systematic errors [latex]\delta P_{\rm syst}[/latex] increase, falling below the thresholds established by two classical baselines - the First Classical (FC) and Extended First Classical (EF) approaches - suggesting that precision in error control is paramount to observing subtle quantum phenomena.](https://arxiv.org/html/2601.15375v1/x20.png)
New analysis reveals that long-baseline neutrino experiments offer a unique way to probe the foundations of quantum mechanics and demonstrate non-classical behavior.
New research suggests our brains may harness principles from quantum physics to navigate complex decisions and embrace multiple possibilities.
![The persistence of string defects within the [latex]4\mathbb{C}[/latex] model is prolonged by strong screening and pinning effects, suggesting that the pathway to global structural coherence is not immediate, but rather contingent upon overcoming these localized impediments.](https://arxiv.org/html/2601.15234v1/figures/3Dframes.jpeg)
New simulations explore how phase transitions in the early universe, specifically within a symmetron dark energy model, affect the formation of large-scale structures and generate detectable signatures in cosmic defect networks.
![The relative abundance of [latex]^{12}C[/latex] is demonstrably linked to the baryon-to-photon ratio, suggesting primordial nucleosynthesis is acutely sensitive to these conditions and foreshadows limitations in reconstructing early universe parameters.](https://arxiv.org/html/2601.15147v1/C12.png)
A new review explores the complex fate of antimatter domains in the early universe and their potential link to the observed matter-antimatter imbalance.
![The material CrSb exhibits spin-split Fermi surface sheets bisected by nodal planes-a consequence of its crystal structure and the trigonal arrangement of antimony ions, which necessitate screw rotations for spin mapping-and characterized by a [latex]\mathcal{Y}\_{4}^{-3}=zy(3x^{2}-y^{2})[/latex] real spherical harmonic indicative of its unique ‘gg-wave’ symmetry profile.](https://arxiv.org/html/2601.14526v1/x1.png)
New quantum oscillation measurements directly map the unconventional magnetic order in CrSb, solidifying its status as a prototypical metallic altermagnet.
A novel framework connects the nonperturbative dynamics of the QCD vacuum with the observed properties of hadrons, offering a path towards a unified understanding of their internal structure.