Hidden Symmetry: Unlocking New Material Properties
A new framework reveals how subtle arrangements within crystalline structures can give rise to unexpected symmetries and influence a material’s electronic behavior.
Science
Beyond the Horizon: Simulating Quantum Fields in Curved Space
![The spectra of quantum field theory and spin systems-examined with parameters [latex]L=128[/latex], [latex]\ell=\pi[/latex], and [latex]m=1[/latex]-demonstrate a divergence attributable to the doubler mass scale, specifically at [latex]2p/\varepsilon - m[/latex], indicating a fundamental distinction in their spectral properties as the parameter <i>p</i> varies from 1 to 0.1.](https://arxiv.org/html/2602.17935v1/x1.png)
Researchers have developed a new method for modeling quantum field theories with boundaries in curved spacetime using open spin systems, offering a path to understanding physics in extreme environments.
Modeling Complex Motion: A New Framework for Multibody Dynamics
Researchers have developed a comprehensive finite element analysis approach to accurately simulate the behavior of interconnected systems undergoing large deformations.
Supercurrents with a Twist: Rethinking Quasiparticle Magnetism
![The interplay of parameters [latex]\mu/t = -0.1[/latex] and [latex]\Delta/t[/latex] sculpts the electronic landscape, manifesting as distinct distributions of Berry curvature and orbital magnetic moment within the Brillouin zone, ultimately influencing the quasiparticle band structure and revealing a tunable relationship between topological properties and low-energy excitations-a relationship further modulated by shifting [latex]\Delta/t[/latex] from 0.09 to 0.225.](https://arxiv.org/html/2602.17376v1/x3.png)
New theoretical work reveals a unique orbital magnetic moment arising from superconducting quasiparticles, diverging from conventional electron behavior and impacting material properties.
Untangling Exotic Vortices in Kagome Superconductors
![On a kagome lattice superconductor, the interplay of sublattice degrees of freedom gives rise to a phase boundary-separating [latex]\Delta+\Delta^{+}[/latex] and [latex]\Delta^{-}\Delta^{-}[/latex] phases-that manifests as a hexagonal structure of fractionalized vortices and suppressed order parameters, each exhibiting individual current loops around the three sublattices.](https://arxiv.org/html/2602.17399v1/x1.png)
New theoretical work predicts the emergence of fractional quantum vortices, tied to individual sublattices, within chiral d+id superconductors on the kagome lattice.
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.
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.