Spectral Capacity and Edge–Bulk Laws for Berezin Quantization

We study the distribution of stable information across the spectrum of the Berezin transform associated with coherent-state quantization. An abstract trace–purity identity shows that an informationally complete POVM on an $N$-dimensional Hilbert space may have algebraic rank $N^2$ while carrying only $O(N)$ eigenvalues above any fixed positive threshold. For Berezin–Toeplitz quantization on a compact polarized Kähler manifold of complex dimension $n$, this square-root loss is sharp: for every fixed $s>0$, $$\\frac{1}{N_k}\\,\\mathord{\\#}\\{\\mu_{k,j}\\ge e^{-s}\\}\\longrightarrow\\frac{s^n}{n!}.$$ The proof comes from the fixed-power trace law $$\\frac{\\operatorname{Tr}(B_k^m)}{N_k}\\longrightarrowm^{-n},$$ and yields a universal edge measure. At exponentially deep scale we factor the positive Berezin spectrum as the Gram spectrum of restriction from $X\\times\\bar X$ to its maximally totally-real diagonal. Finski's logarithmic transfer theory then gives a macroscopic depth distribution governed by a Mabuchi transfer function $\\Phi_\\Delta$. Using attached analytic discs and rooftop contact, we prove $$\\Phi_\\Delta(y)\\asymp d(y,\\Delta)^2,\\qquad\\nu_Y\\{\\Phi_\\Delta\\le a\\}\\asymp a^n.$$ Thus the same exponent governs the universal fixed-depth edge and the zero-depth boundary of the global spectral bulk. Finally, using the classical exact projective spectrum, we derive on $\\mathbb{CP}^n$ the full mesoscopic law $$\\mathord{\\#}\\{\\mu_{k,j}\\ge e^{-s_k}\\}\\sim\\frac{k^n s_k^n}{(n!)^2}$$ for every $1\\ll s_k\\ll k$. No growing-window heat approximation or unproved quantitative transfer rate is used in the main theorem chain.

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Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-09-15
DOI
https://doi.org/10.5281/zenodo.22761470
Primary Topic
Geometry and complex manifolds
Type
preprint
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preprint

Spectral Capacity and Edge–Bulk Laws for Berezin Quantization

Tao Lin
Zenodo (CERN European Organization for Nuclear Research)
Geometry and complex manifolds
preprint

Spectral Capacity and Edge–Bulk Laws for Berezin Quantization

Tao Lin
preprint en

Abstract

We study the distribution of stable information across the spectrum of the Berezin transform associated with coherent-state quantization. An abstract trace–purity identity shows that an informationally complete POVM on an $N$-dimensional Hilbert space may have algebraic rank $N^2$ while carrying only $O(N)$ eigenvalues above any fixed positive threshold. For Berezin–Toeplitz quantization on a compact polarized Kähler manifold of complex dimension $n$, this square-root loss is sharp: for every fixed $s>0$, $$\frac{1}{N_k}\,\mathord{\#}\{\mu_{k,j}\ge e^{-s}\}\longrightarrow\frac{s^n}{n!}.$$ The proof comes from the fixed-power trace law $$\frac{\operatorname{Tr}(B_k^m)}{N_k}\longrightarrowm^{-n},$$ and yields a universal edge measure. At exponentially deep scale we factor the positive Berezin spectrum as the Gram spectrum of restriction from $X\times\bar X$ to its maximally totally-real diagonal. Finski's logarithmic transfer theory then gives a macroscopic depth distribution governed by a Mabuchi transfer function $\Phi_\Delta$. Using attached analytic discs and rooftop contact, we prove $$\Phi_\Delta(y)\asymp d(y,\Delta)^2,\qquad\nu_Y\{\Phi_\Delta\le a\}\asymp a^n.$$ Thus the same exponent governs the universal fixed-depth edge and the zero-depth boundary of the global spectral bulk. Finally, using the classical exact projective spectrum, we derive on $\mathbb{CP}^n$ the full mesoscopic law $$\mathord{\#}\{\mu_{k,j}\ge e^{-s_k}\}\sim\frac{k^n s_k^n}{(n!)^2}$$ for every $1\ll s_k\ll k$. No growing-window heat approximation or unproved quantitative transfer rate is used in the main theorem chain.

Zenodo (CERN European Organization for Nuclear Research)
Geometry and complex manifolds
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Spectral Capacity and Edge–Bulk Laws for Berezin Quantization — Tao Lin · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS