Hunting Hidden Axions: New Limits from Missing Energy and Electric Dipoles
^{2}[/latex].](https://arxiv.org/html/2602.11405v1/feynman_GammaD_To_chi_chi.png)
A new analysis tightens the constraints on dark axion interactions, leveraging both searches for invisible particles and precise measurements of fundamental asymmetries.
Science
Magnetized Matter: Unveiling the Secrets of Extreme QCD
New research explores how strong magnetic fields and particle density affect the behavior of the fundamental matter described by quantum chromodynamics.
Cracks in the Standard Model: New Insights into Heavy Flavor Decays
![Recent determinations of the ratio [latex]V_{ub}/V_{cb}[/latex] - calculated from decays of [latex]B_s[/latex] and [latex]\Lambda_b[/latex] baryons using form factors from HPQCD, FNAL/MILC, DM, and LCSR calculations - are presented alongside experimental averages and theoretical predictions for [latex]R_D[/latex] and [latex]R_{D^{*}}\[/latex], offering a comprehensive view of the parameters governing the Standard Model and potential avenues for new physics.](https://arxiv.org/html/2602.11997v1/x6.png)
Recent experiments are challenging our understanding of how beauty and charm quarks decay, revealing intriguing discrepancies that could point to new physics.
Resonance Unveiled: A New Lens for Quantum Control and Nuclear Moments
This review details a refined theoretical approach to magnetic resonance, enhancing both the precision of nuclear moment measurements and the potential for control in quantum computing applications.
From Quantum Foam to Cosmic Expansion: A New Entropic Link
![The relationship [latex]\delta(\Delta)[/latex] reveals how the Barrow-Tsallis model-and its simplification to the extensive limit-define a distribution generated through Monte Carlo methods, all while remaining constrained by specific cosmographic parameters [latex]q_0 = -0.580[/latex] and [latex]j_0 = 0.745[/latex].](https://arxiv.org/html/2602.12077v1/x3.png)
A novel framework connects the microscopic structure of spacetime with the large-scale behavior of the universe through a shared entropic foundation.
Spacetime’s Uncertainty: Quantum Limits Near Black Holes
![The study investigates entropic uncertainty relations within a Werner state [latex]\hat{\rho}\_{A{B\rm{{}\_{I}}}{C\rm{{}\_{I}}}}^{\rm Werner}[/latex] situated in a Schwarzschild black hole, demonstrating how this uncertainty-and its lower bounds, including a newly proposed one-varies predictably with both distance [latex]R\_{0}[/latex] and Hawking temperature [latex]T[/latex], under conditions of purity [latex]p=0.5[/latex] and a state parameter [latex]z=\frac{{\sqrt{2}}}{2}[/latex], as quantified by the [latex]l\_1[/latex]-norm.](https://arxiv.org/html/2602.11503v1/x15.png)
New research explores how fundamental quantum uncertainty principles are affected by the extreme gravity of Schwarzschild black holes, revealing a link between spacetime and quantum coherence.
Seeing Beyond the Average: A New Microscope for Quantum Matter
Researchers are developing a matter-wave microscope capable of directly visualizing the subtle correlations that define exotic states of quantum matter.
Hunting Bugs in Quantum Code
![The framework, [latex]\text{SB-QOPS}[/latex], defines a measurement process through a set comprising a Pauli family [latex]\mathit{F}[/latex], its corresponding eigenvalues [latex]\mathit{EV}[/latex], and a designated measurement outcome [latex]\mathit{M}[/latex] determined by a compact program specification [latex]\mathit{PS\_{compact}}[/latex], effectively linking abstract quantum operations to concrete measurement results.](https://arxiv.org/html/2602.11487v1/Overview.png)
A novel search-based testing approach dramatically improves the detection of errors in quantum circuits, bringing us closer to reliable quantum computation.
Quantum Echoes: Steering Entanglement in Particle Collisions
![The study details a coordinate system transformation for analyzing the decay of [latex]e^{+}e^{-}\rightarrow\gamma^{\*}/\psi\rightarrow Y\bar{Y}[/latex], establishing a consistent chirality between hyperon Y and antihyperon [latex]\bar{Y}[/latex] through defined axes-[latex]{\hat{\mathbf{x}}, \hat{\mathbf{y}}, \hat{\mathbf{z}}}[/latex] for Y and [latex]{\hat{\mathbf{x}}^{\prime}, \hat{\mathbf{y}}^{\prime}, \hat{\mathbf{z}}^{\prime}}[/latex] for [latex]\bar{Y}[/latex]-derived from momentum vectors and cross-product calculations, ensuring a mirrored relationship where the antihyperon’s axes are inversions of the hyperon’s.](https://arxiv.org/html/2602.10389v1/x1.png)
New research demonstrates control over quantum entanglement and Bell nonlocality in hyperon-antihyperon pairs created from polarized electron-positron annihilation.
The Edge of Order: How Quasiperiodicity Shatters Localization
![The system exhibits tunable, non-reciprocal hopping-characterized by strengths of [latex]J e^{\pm\alpha}[/latex]-coupled with a quasiperiodic onsite potential [latex]\lambda_{j}[/latex], and further refined by an impurity bond whose hopping strength is adjustable via parameter μ.](https://arxiv.org/html/2602.11155v1/x1.png)
New research reveals how introducing quasiperiodic order into non-Hermitian systems can dramatically alter electron behavior, leading to either extended states or the emergence of the non-Hermitian skin effect.