Fluorine Atoms Reveal Quantum Electrodynamics in Extreme Conditions
![The study demonstrates that within kaonic atoms, the ratio of the local to critical field strength-[latex]\chi = \langle \mathcal{E} \rangle_{n\ell} / \mathcal{E}_{c}[/latex]-increases with nuclear charge, revealing that transitions involving specific KF states probe electromagnetic fields at or exceeding the Schwinger limit of [latex]\mathcal{E}_{c} = m_{e}^{2}c^{3}/(e\hbar) \sim eq 1.3 \times 10^{18} V/m[/latex].](https://arxiv.org/html/2604.19387v1/x2.png)
New measurements of X-ray transitions in kaonic fluorine provide unprecedented access to the strong-field regime of quantum electrodynamics, validating theoretical predictions.
Science
Entanglement’s Hidden Currents: Unveiling Charge-Sector Dynamics
New research explores how entanglement is distributed across different charge sectors in non-relativistic field theories, revealing unexpected behaviors in quantum systems.
Hunting for New Physics with the Tau Lepton
![The study demonstrates that photon-photon luminosity, quantified as a function of invariant mass [latex]M_{\gamma\gamma} \equiv W_{\gamma\gamma}[/latex], exhibits a dominance of PbPb interactions at lower masses-facilitating more direct measurement of [latex]a_{\tau}[/latex]-while proton-proton collisions extend the reach towards the TeV energy frontier.](https://arxiv.org/html/2604.19665v1/luminosity.jpg)
A comprehensive review explores how precise measurements of the tau lepton’s magnetic moment could reveal hints of physics beyond the Standard Model.
Hunting for Miniature Black Holes at the Large Hadron Collider
A new analysis of proton-proton collisions at the ATLAS detector reveals no evidence of quantum black holes, pushing the boundaries of extra-dimensional theories.
Hunting for Gravitons: A New Path to Quantum Gravity
Researchers are exploring innovative detector models to predict and potentially observe the faint signatures of quantum gravity through the spontaneous emission of single gravitons.
Beyond Einstein: A Quantum Theory of Spacetime
A new theoretical framework proposes that gravity emerges from the fundamental laws of quantum mechanics, potentially unifying dark matter, spacetime, and the cosmological constant.
Magnetic Highways for Quantum Bits
Researchers are exploring the use of moving magnetic structures in novel materials as a promising pathway for building scalable quantum computers.
Hunting New Physics with the Tau Lepton
![The contribution of four-fermion operators to [latex] F_2F_{2} [/latex] is visualized through Feynman diagrams, with square dots specifically denoting the insertion of the Standard Model Effective Field Theory dipole operator.](https://arxiv.org/html/2604.16598v1/x1.png)
Precision measurements of the tau lepton’s properties offer a promising avenue for detecting subtle deviations from the Standard Model and uncovering new sources of CP violation.
Spacetime as Perspective: A New Framework for Quantum Gravity
This review explores how observer-dependent spacetime, built on the foundations of fibre bundles and causal sets, can reconcile relative locality with a generalized understanding of quantum gravity.
Hunting for New Physics in B-Meson Decay
![The differential decay rate of [latex]B\to X_{s}\ell^{+}\ell^{-}[/latex] exhibits sensitivity to new physics beyond the Standard Model, as evidenced by a comparison between observed distributions and theoretical predictions, while a boosted decision tree analysis of [latex]B\to K_{S}^{0}\tau^{+}\tau^{-}[/latex] decays confirms the presence of a signal with a branching fraction of [latex]8.4\times 10^{-3}[/latex], further validating the search strategy.](https://arxiv.org/html/2604.17644v1/x2.png)
Recent results from the Belle II experiment are pushing the boundaries of our understanding of particle physics by scrutinizing rare B-meson decays for signs of physics beyond the Standard Model.