Year: 2026
Type: preprint
Abstract: We deduce zero-density estimates in short vertical strips from short-interval moments of globally tempered automorphic $L$-functions, by adapting the large-value estimate of Guth and Maynard and the Type II zero argument of Maynard and Pratt to the framework of Ye and Zhang. For the Riemann zeta function, we obtain $N_ζ(σ;T,T+T^a)\ll T^{15a(1-σ)/(3+5σ)+\varepsilon}$ for $2/3\le a\le1$ and $7/10\leσ\le4/5$, improving Ye--Zhang's exponent in the interior of this range. Combining the localized density bound with the recent quasi-Riemann theorems, we estimate smoothed prime-power sums with phase $\exp(2πiαn^β)$ on intervals of length $K^δ$. For $0<β<13/20$, we obtain a power saving whenever $\max\{17/30,1-β\}<δ<1$; in particular the square-root phase admits every $δ>17/30$. A revised transform estimate retains both the stationary spread and the Fourier width $K/L$. For example, the bound at $β=1/2$, $δ=3/5$ is $K^{15/26+\varepsilon}$, uniformly for frequencies $mα$ with $1\le m\le K^{1/10}$. We also retain power savings for certain self-dual $GL(2)$ twists and self-dual $GL(3)$ cusp forms, without assuming Ramanujan. All three applications have explicit frequency dependence.
Source: arXiv (Cornell University)
Author: Ye, Yangbo
Institution: University of Iowa
Language: English
Subfield: Algebra and Number Theory
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7221832716