A complex-analytic proof of square-restricted stable phase retrieval in Fock space

arXiv:2608.26365 2026 Regularization 1 ideas extracted · analyzed Aug 29, 2026

What the math gives to ML

The paper proves a coercivity statement for holomorphic Fock-space functions: deviation of the intensity |F|^2 from its best constant baseline controls deviation of the squared analytic representation F^2 from the phase-invariant anchor F(0)^2. This gives a nontrivial stability certificate for models whose observations discard phase, rather than merely supplying another reconstruction loss. The most plausible neural transfer is a complex-valued, analytically parameterized feature module for phase retrieval or magnitude-only sensing, using a Gaussian-weighted intensity residual as a stability regularizer. The result is specialized and likely moderate-impact, but it suggests a concrete way to prevent magnitude-only training from producing unstable complex features.

Ideas from this paper

Unverified 2026

Fock-Coercive Magnitude Loss for Complex Features

Parameterize a complex neural feature F(z) as a low-degree holomorphic polynomial and train it from magnitude-squared observations using a Gaussian-weighted residual to the best constant intensity baseline. The paper's coercivity inequality makes this more than an observation-space loss: small intensity variation certifiably bounds the error of the phase-invariant squared feature F^2-F(0)^2. Use the bound as a regularizer or as a replacement for an unavailable complex-target loss in…

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Paper: A complex-analytic proof of square-restricted stable phase retrieval in Fock space arXiv:2608.26365