Generic Spectral Determination of Semiclassical Schrödinger Operators with $\mathbb Z_2$-Symmetry
Year: 2026
Type: preprint
Abstract: Consider the two-dimensional semiclassical Schrödinger operator $P_\hbar=-\frac{\hbar^2}{2}Δ+V$ on $\mathbb R^2$, where $V$ has a nondegenerate well at the origin, its harmonic frequencies are rationally independent, and $V$ is $\mathbb Z_2$-symmetric. We prove that, generically, the first three layers of the quantum Birkhoff normal form (QBNF) determine the full Taylor series of $V$ at the origin, up to the unavoidable spatial inversion $V(x)\mapsto V(-x)$. The generic condition depends only on the jet of $V$ through order ten. Consequently, for real analytic potentials with a unique isolated global well at the origin, the low-lying semiclassical spectrum generically determines $V$ up to spatial inversion.
Source: arXiv (Cornell University)
Author: Wei, Qiaoling
Language: English
Subfield: Mathematical Physics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7202290806