![Theoretical predictions demonstrate the concurrent quenching of angular parameters [latex]\lambda_{\theta}, \lambda_{\phi}[/latex] and the frame-invariant [latex]\tilde{\lambda}[/latex] as a function of <i>z</i>, with uncertainties estimated within [latex]\eta \in [4.0, 5.0][/latex], and highlighting that the dominant contribution to the cross-section occurs within the decohered limit-as suggested by the schematic profile of <i>D(z)</i>.](https://arxiv.org/html/2604.11847v1/x1.png)
A new theoretical framework explains the surprisingly low polarization of quarkonium states by detailing how rapid spin decoherence within the dense environment of jet fragmentation quenches their inherent alignment.
A new perspective explores how to accurately measure entropy in systems far from stability, revealing insights into phase transitions and complex behaviors.
![The concurrence of the spin density matrix for the quantum electrodynamic process of electron-positron annihilation into a virtual photon, subsequently decaying into a fermion-antifermion pair, exhibits a dependence on beam polarization-ranging from unpolarized states to increasingly transversely polarized beams of 50%, 80%, and 100%-as observed within the [latex]\cos\theta-\beta[/latex] plane of the center-of-mass frame with [latex]\phi=0[/latex].](https://arxiv.org/html/2604.11887v1/x3.png)
High-energy electron-positron collisions, when utilizing transverse polarization, can reliably produce maximally entangled fermion pairs.
![Analysis of entanglement entropy crossing points-specifically, those between symmetry sectors with differing total spin-reveals a critical point at [latex]D_c = 0.980223(5)[/latex] for [latex]\alpha = 5[/latex], a value determined by fitting the crossing points to a [latex]D_c + aL^{-b}[/latex] function and confirmed by the scaling of entanglement entropy as [latex](c_{\text{eff}}/3)\,\ln L[/latex] at the critical point, indicating a conformal field theory description and yielding an effective central charge of unity that remains consistent across varying decay exponents.](https://arxiv.org/html/2604.12754v1/x4.png)
New research reveals surprising critical phenomena and entanglement scaling in a long-range spin-one Heisenberg chain with single-ion anisotropy.
![A magnetic brane’s consistent coupling necessitates its embedding within a topological quantum field theory defined on a surface Σ, and the presence of a ’t Hooft anomaly within that theory for a global symmetry group [latex]G[/latex] directly implies a breaking of that symmetry on the brane’s worldvolume - a phenomenon consistently observed in this work and attributable to the charged degrees of freedom induced by quantum inflow.](https://arxiv.org/html/2604.11877v1/x2.png)
New research reveals how exotic symmetries constrain the behavior of axions, fundamental particles considered prime candidates for dark matter.
Researchers are harnessing the power of artificial intelligence to analyze data from experiments mimicking black hole behavior, offering new insights into these enigmatic objects.
New research explores how particles behave in complex, synthetic force fields that go beyond traditional electromagnetic interactions.
![The complex spectrum of a generalized non-Hermitian Su-Schrieffer-Heeger model-specifically with parameters [latex]t_2 = 1[/latex], [latex]t_3 = 2/5[/latex], [latex]\gamma_1 = 2[/latex], and [latex]\gamma_2 = 2/3[/latex] as defined by Eq. (92)-reveals a band structure determined through both direct diagonalization and generalized Brillouin zone calculations for a system of size 100, demonstrating the consistency of these two approaches in characterizing the model’s spectral properties.](https://arxiv.org/html/2604.10043v1/x1.png)
New research reveals how the quantum metric governs the unusual behavior of light and matter in non-Hermitian systems, explaining the origins of the non-Hermitian skin effect.
A new analysis proposes a robust metric to identify truly transformative discoveries by measuring not just impact, but also novelty and a departure from established norms.
New advances in representing quantum states with continuous matrix product states offer a promising path towards simulating complex quantum field theories.