CrSb Confirmed: A Room-Temperature Altermagnet with Exotic Spin Texture
![The material CrSb exhibits spin-split Fermi surface sheets bisected by nodal planes-a consequence of its crystal structure and the trigonal arrangement of antimony ions, which necessitate screw rotations for spin mapping-and characterized by a [latex]\mathcal{Y}\_{4}^{-3}=zy(3x^{2}-y^{2})[/latex] real spherical harmonic indicative of its unique ‘gg-wave’ symmetry profile.](https://arxiv.org/html/2601.14526v1/x1.png)
New quantum oscillation measurements directly map the unconventional magnetic order in CrSb, solidifying its status as a prototypical metallic altermagnet.
Science
From QCD Vacuum to Hadron Structure: A New Bridge
A novel framework connects the nonperturbative dynamics of the QCD vacuum with the observed properties of hadrons, offering a path towards a unified understanding of their internal structure.
Beyond Einstein: Hunting for Massive Ripples in Spacetime
![The study demonstrates how introducing a massive spin-2 field alters gravitational waveforms-specifically those resembling GW150914-with the degree of alteration dependent on parameters [latex]m[/latex] and [latex]\tan\theta[/latex], and its impact is quantifiable within the detectability forecasts established by the LIGO-Virgo-KAGRA collaboration using GWTC-4 events.](https://arxiv.org/html/2601.15201v1/x6.png)
New research forecasts the potential to detect subtle distortions in gravitational waves caused by the existence of massive spin-2 fields, offering a pathway to test alternatives to general relativity.
Echoes of Transition: When Finite Systems Resonate Between Classical and Quantum Realms
New research reveals a resonant phenomenon within the hysteresis zone of finite-size systems undergoing continuous phase transitions, potentially linking classical behavior to emergent quantum characteristics.
Mapping Gravity to the Quantum Realm
New research bridges the gap between quantum scattering and classical spacetime, offering a powerful framework for understanding black holes and their gravitational signatures.
The Quantum Dilemma: Science, Security, and a Call for Disarmament
A growing number of quantum scientists are voicing concerns about the increasing entanglement of their research with military applications and advocating for a more ethical and transparent approach to funding and development.
Unlocking the Secrets of Quantum Spin Liquids with Magnetic Fields
![The extended ferromagnetic Kitaev model exhibits a temperature-dependent specific heat influenced by applied magnetic fields, with phase boundaries discernible through simulation, while in monolayer [latex] \alpha-\alpha-RuCl_3 [/latex], the spatial decay of local density of states suggests the presence of gapless Majorana fermions manifesting as spinon Friedel oscillations.](https://arxiv.org/html/2601.14496v1/x4.png)
New research explores how applying magnetic fields can reveal exotic phases and emergent behavior in Kitaev spin liquids, pushing the boundaries of condensed matter physics.
Beyond the Void: Entanglement’s Role in Vacuum Decay
![The study of the Sauter-Schwinger effect reveals a pairwise entanglement entropy [latex]S_{\mathbf{k}}[/latex] that is particularly pronounced for the infrared mode [latex]\omega_{\mathbf{k}}^{+}=\mu[/latex], suggesting a fundamental link between vacuum decay and quantum correlations at low frequencies.](https://arxiv.org/html/2601.14390v1/x2.png)
New research reveals how entanglement scales during the Sauter-Schwinger effect, a process where intense fields trigger pair creation from the quantum vacuum.
Ghost Particles, Real Insights: The Latest on Neutrino Mysteries
New experimental data is reshaping our understanding of neutrinos, those elusive particles that could hold the key to physics beyond the Standard Model.
Quantum’s Inclusion Gap: A Workforce at Risk
![A stark disparity emerged from the survey data, revealing that over half of marginalized quantum scientists seriously contemplated leaving the field-a rate dramatically lower among their non-marginalized peers [latex] (M=2.05, SD=1.01) [/latex] compared to [latex] (M=3.12, SD=1.19, t[347]=-9.06, p<.001) [/latex], highlighting a systemic pressure driving talent away from quantum science based on perceived marginalization.](https://arxiv.org/html/2601.14297v1/Violin-Leaving.png)
A new global survey reveals widespread disparities in experiences for marginalized groups within the burgeoning field of quantum science, threatening its long-term potential.