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quant-ph2026
Enhanced Quantum Metrology via Saddle-Point Scrambling in Phase Space
Lei Shao, Hai-Jun Xing, Libin Fu
Nonlinear effects are widely utilized in quantum metrology to enhance measurement precision by leveraging complex dynamical behaviors. Here, we propose a quantum scrambling-integra…
hep-ph2026
Laser-induced selection of longitudinal bosons in resonant annihilation
Fengye Chen, Qingzheng Lv, Libin Fu
Longitudinal \(Z\)-boson production is strongly suppressed in collinear \(e^+e^-\) annihilation in vacuum due to current conservation and helicity selection. We show that this supp…