2 papers
hep-th2026
Perturbative unitarity bounds on field-space curvature in de Sitter spacetime: purity vs scattering amplitude
Qianhang Cai, Tomoya Inada, Masataka Ishikawa +2
We study perturbative unitarity bounds on the field-space curvature in de Sitter spacetime, using the momentum-space entanglement approach recently proposed by Duaso Pueyo, Goodhew…
quant-ph2025
Conditions for Quantum Violation of Macrorealism in Large-spin Limit
Qi-Hong Cai, Xue-Hao Yu, Ma-Cheng Yang +2
This study investigates the emergence of macroscopic classical behavior from quantum foundations via the entropic Leggett--Garg inequality. We introduce a geometric framework for d…