Beyond the Standard Model: Anisotropic Interactions in Weyl Semimetals
New research reveals that Coulomb interactions within generalized Weyl semimetals create direction-dependent electronic behavior, challenging traditional Fermi liquid theory.
Science
Light Control of Magnetism: A New Twist in Layered Materials
![The magnetoelectric Raman force response function [latex]\chi^{\alpha l}_{2}(\omega_{1},\omega_{2})[/latex]-where α denotes longitudinal or transverse components and [latex]l[/latex] represents the x or y direction-is determined by the interplay of four Green’s functions [latex]G_{1,..4}(\boldsymbol{k},i\omega_{n})[/latex] and symmetrized Bogoliubov transformations of 4x4 polarization matrices, establishing a framework for understanding complex material responses to external stimuli.](https://arxiv.org/html/2602.16785v1/x12.png)
Researchers have theoretically shown how electric fields can be used to manipulate magnetic states in a specific class of layered materials through a novel coupling between light and atomic vibrations.
Molecular Quantum States Hold Coherence for Record Times
Researchers have achieved remarkably long coherence times in complex molecular states, opening new possibilities for quantum simulations and precision measurements of fundamental physics.
Rydberg Atoms Illuminate Hidden States in Doped Magnets
![Rydberg atom arrays leverage local hole injection-induced by a combination of global microwave radiation and modulated light shifts at frequencies [latex]\omega\_{\rm MW}\pm\omega\_{\rm LS}[/latex]-to probe the many-body spectrum and access the local density of states, demonstrated by observing sideband coupling to both eigenstates in a two-atom system and a Rabi frequency that aligns with expected Bessel function [latex]J\_{1}(\kappa)[/latex] behavior.](https://arxiv.org/html/2602.17600v1/x1.png)
A new spectroscopic technique using precisely controlled Rydberg atoms allows researchers to map out the energy landscape of complex magnetic materials.
Hunting Dark Matter with a Magnetic Grid
![This work projects the sensitivity of a proposed ferromagnet lattice magnetometer to ultralight dark matter couplings, demonstrating constraints-shown as a solid red curve-that improve upon existing limitations derived from both the literature [15,16] and single ferromagnet magnetometers [8], based on calculations utilizing a [latex]1\ \mathrm{m}[/latex] shield size and established parameter configurations.](https://arxiv.org/html/2602.17291v1/x4.png)
A novel magnetometer design leveraging a ferromagnet lattice promises enhanced sensitivity in the search for ultralight dark matter particles.
Instantons Illuminate Particle Interactions
New research reveals a powerful method for calculating how particles scatter in the presence of exotic quantum fields known as instantons.
Echoes of Destruction: Unveiling the X-ray Behavior of Tidal Disruption Events
A new study provides the first detailed look at how X-ray emissions change over time in the aftermath of a star being torn apart by a black hole.
Black Hole Entropy Gets a Universal Quantum Correction
![The phase space of a Kerr-de Sitter black hole, depicted with [latex]\ell = 1[/latex], demonstrates how ensemble choices-visualized as directional arrows, with the red arrow specifically detailing the selection used in Section 7.1-influence the system’s trajectory and potential states.](https://arxiv.org/html/2602.16767v1/x1.png)
New research reveals a consistent logarithmic correction to the entropy of near-extremal black holes, stemming from subtle quantum effects.
Unveiling the Secrets of Particle Collisions at Low Momentum
![Dilepton transverse momentum distributions-analyzed at collision energies of 13 TeV and 38.8 GeV using the Pdf2Is approach with a fixed gluon mass of 2.0 GeV-demonstrate the capacity to model experimental measurements [19, 21] and quantify theoretical uncertainties across a range of invariant masses.](https://arxiv.org/html/2602.17533v1/x23.png)
New research sheds light on the complex interplay of quantum effects that govern particle production in high-energy collisions.
Entangled States, Topological Order, and the Fabric of Reality
New research reveals a fundamental link between the complex entanglement of many particles and the underlying topological order governing their long-range behavior.