T. Helbig

collaborators

5 papers

gr-qc2026

Thermal false vacuum decay near black holes is aspherical

D. S. Gorbunov, D. G. Levkov, V. E. Maslov

We study decay of a scalar field false vacuum near a (3+1)-dimensional Schwarzschild black hole equilibrated at Hawking temperature with the environment. Our scalar field model has…

cond-mat.supr-con2026

Origin of Spin Stripes in Bilayer Nickelate La $_{3}$ Ni $_{2}$ O $_{7}$

Hao-Xin Wang, Hanbit Oh, Tobias Helbig +7

The bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$ has recently emerged as a high-temperature superconductor with unusual spin stripe order in its ambient pressure phase. We propose a microsc…

cond-mat.str-el2026

Momentum-Space Entanglement Signatures and Spinon Breakdown in the $J_{1}$ - $J_{2}$ Zig-Zag Heisenberg Chain

Tom Oeffner, Ludwig Bordfeldt, Andreas Feuerpfeil +5

We investigate the resilience of spinon quasiparticles in the $J_{1}$ - $J_{2}$ zig-zag spin chain ( $J_{2} > 0$ ) from the viewpoint of momentum-space entanglement. For small $J_{2}$ , we show t…

cond-mat.supr-con2026

Superconductivity and magnetism in bilayer nickelates: itinerant perspective

Yi-Ming Wu, Tobias Helbig, Salahudin V. SmailagiÄ +4

We study superconductivity and magnetism in bilayer nickelates from an itinerant perspective. Starting from a tight binding fit to recent ARPES measurements on compressively strain…

cond-mat.supr-con2025

How pairing mechanism dictates topology in valley-polarized superconductors with Berry curvature

Julian May-Mann, Tobias Helbig, Trithep Devakul

We investigate how the pairing mechanism influences topological superconductivity in valley-polarized systems with Berry curvature. We demonstrate that short-range attractive inter…