Seeing the Unseen: Metasurface Tech Spots Single Nanoparticles
Researchers have developed a novel approach to detect individual virus-sized nanoparticles using silicon metasurfaces and the unique properties of quasi-bound states in the continuum.
Science
Twisted Light: A New Path to One-Way Optical Flow
![A photonic crystal composed of spinning cylinders demonstrates both circular dichroism and nonreciprocity, with systems transformable via mirror symmetry and [latex]180^{\circ}[/latex] rotation, resulting in distinct absorption spectra under circularly polarized light and a measurable absorption dissymmetry factor.](https://arxiv.org/html/2603.11839v1/x4.png)
Researchers have demonstrated strong nonreciprocal light transmission within a specially engineered photonic crystal composed of spinning dielectric cylinders.
Twisting Topology: The Hidden Structures Within Chern-Simons Theory
New research reveals the crucial role of geometric structures in understanding and constructing fully local topological field theories.
Hall Effect Without a Magnet: A New Route to Dissipative Conductivity
Researchers have discovered a mechanism for generating a Hall effect in two-dimensional systems driven by dissipation and interactions, bypassing the need for external magnetic fields or equilibrium conditions.
Quantum Chaos and the Path to a Spin Liquid
![The study of self-consistent equations reveals that the fermionic and spin spectral densities exhibit distinct behaviors-Ohmic in the paramagnetic phase and sub-Ohmic in the spin-glass phase-and that the static magnetic susceptibility plateaus at [latex]J|\chi(0)|=1[/latex] for large values of [latex]\mathcal{N}_f[/latex] before the critical temperature of [latex]T_c=J/4[/latex], while quantum fluctuations shift this transition to lower temperatures for smaller [latex]\mathcal{N}_f[/latex] values, ultimately influencing the saturation and suppression of the spin-glass order parameter at high and low [latex]\mathcal{N}_f[/latex] values, respectively.](https://arxiv.org/html/2603.11263v1/x3.png)
New research explores how quantum fluctuations drive a transition from a disordered spin glass to a potentially chaotic quantum spin liquid state in a fully connected system.
Unlocking Hidden Polarity in Strontium Titanate
New research reveals that carefully applied strain can stabilize a previously undetected polar phase within the quantum paraelectric material strontium titanate.
Unmasking New Physics in Tau Decay
![The figure details a density plot of a figure of merit-defined by [latex]eq. (28)[/latex]-revealing parameter space characteristics for the [latex]K\_S[/latex] decay channel when the imaginary component of the dielectric tensor is fixed at [latex]8\times 10^{-5}[/latex].](https://arxiv.org/html/2603.11348v1/x1.jpg)
A new analysis explores how subtle asymmetries in the decay of tau leptons can reveal hints of physics beyond the Standard Model.
Beyond Conventional Materials: Designing for Extreme Elasticity
![The study elucidates the inherent order within the symmetry classes of [latex]\mathbb{E}\mathrm{la}[/latex], demonstrating its structure as a partially ordered set-a framework inevitably destined to become the foundation for future technical challenges.](https://arxiv.org/html/2603.12019v1/x1.png)
New research explores the design of three-dimensional materials with tailored elastic properties, moving beyond traditional isotropic behaviors.
Taming Exotic Charges: A Path to Quantum Computing
![Fabry-Pérot interferometry performed on bilayer graphene at extremely low temperatures ([latex]20\,\mathrm{mK}[/latex]) and high magnetic fields ([latex]9.95\,\mathrm{T}[/latex]) reveals Aharonov-Bohm oscillations in five distinct fractional quantum Hall states ([latex]\nu=-1/2,-2/5,-1/3,1+1/3,1+1/2[/latex]), enabling the extraction of charge carried by quasiparticles on the interfering edge and confirming a cavity area of [latex]0.56\,\mu\mathrm{m}^{2}[/latex] closely matching the lithographically defined area of [latex]0.7\,\mu\mathrm{m}^{2}[/latex].](https://arxiv.org/html/2603.11182v1/fig1_v9.jpg)
Researchers have demonstrated precise control over fractional charges within a graphene device, paving the way for manipulating the elusive particles known as anyons.
Beyond Equilibrium: Decoding Anomalous Relaxation in Complex Systems
![The study demonstrates that a precooling protocol, optimized at [latex]t_{w} = 0.350[/latex], accelerates thermalization of both exchange energy and magnetization per spin, achieving the fastest relaxation to equilibrium and maximizing mode-suppression as indicated by a zero-crossing in the fitted amplitude [latex]a_{2}[/latex]-a result suggesting that system dynamics are acutely sensitive to the specific parameters of this initial conditioning phase.](https://arxiv.org/html/2603.11326v1/x31.png)
New research sheds light on the surprising ways systems settle into equilibrium, exploring phenomena like the Mpemba effect at the largest scales.