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arxiv: 2211.01199 · v3 · pith:KKYODBIKnew · submitted 2022-11-02 · 🧮 math.PR · math.SP

Anderson Hamiltonians with singular potentials

Pith reviewed 2026-05-24 10:32 UTC · model grok-4.3

classification 🧮 math.PR math.SP
keywords Anderson Hamiltoniansingular potentialsintegrated density of statesLifschitz tailsprincipal eigenvaluesrandom Schrödinger operatorsDirichlet boundary conditionsNeumann boundary conditions
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The pith

Anderson Hamiltonians are constructed for singular random potentials on bounded domains, with their integrated density of states and Lifschitz tail relations to principal eigenvalues established.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper constructs random Schrödinger operators known as Anderson Hamiltonians for a broad class of singular random potentials on bounded domains, allowing both Dirichlet and Neumann boundary conditions. It also constructs the integrated density of states for these operators. The central result connects the asymptotics of the left tails of this density, called Lifschitz tails, to the left tails of the principal eigenvalues. A sympathetic reader would care because singular potentials appear in models with strong irregularities or impurities, and the work extends the reach of spectral analysis to these cases.

Core claim

We construct random Schrödinger operators, called Anderson Hamiltonians, with Dirichlet and Neumann boundary conditions for a fairly general class of singular random potentials on bounded domains. Furthermore, we construct the integrated density of states of these Anderson Hamiltonians, and we relate the Lifschitz tails (the asymptotics of the left tails of the integrated density of states) to the left tails of the principal eigenvalues.

What carries the argument

Anderson Hamiltonian with singular random potential on a bounded domain, which enables the definition of the operator and the spectral tail relations under Dirichlet or Neumann conditions.

If this is right

  • The construction applies equally to Dirichlet and Neumann boundary conditions on bounded domains.
  • The integrated density of states exists for the operators built from this class of singular potentials.
  • Lifschitz tails of the integrated density of states are determined by the left tails of the principal eigenvalues.
  • The results hold for fairly general singular random potentials without requiring additional regularity.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The tail relation may allow indirect estimation of spectral properties through eigenvalue computations in irregular settings.
  • Similar constructions could be tested for other boundary conditions or on domains with varying geometry.
  • The framework might connect to numerical simulations of disordered quantum systems with point-like singularities.
  • Extensions to time-dependent or nonlinear variants of the operators could build on the same singular-potential handling.

Load-bearing premise

The singular random potentials must belong to a class that permits both the construction of the operators and the relation between Lifschitz tails and principal eigenvalue tails.

What would settle it

A concrete singular potential in the claimed general class for which the Anderson Hamiltonian cannot be constructed, or for which the Lifschitz tail asymptotics fail to match the left tails of the principal eigenvalues.

read the original abstract

We construct random Schr\"odinger operators, called Anderson Hamiltonians, with Dirichlet and Neumann boundary conditions for a fairly general class of singular random potentials on bounded domains. Furthermore, we construct the integrated density of states of these Anderson Hamiltonians, and we relate the Lifschitz tails (the asymptotics of the left tails of the integrated density of states) to the left tails of the principal eigenvalues.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

0 major / 2 minor

Summary. The paper constructs random Schrödinger operators (Anderson Hamiltonians) with Dirichlet and Neumann boundary conditions for a class of singular random potentials on bounded domains. It constructs the integrated density of states (IDS) of these operators as the almost-sure limit of empirical eigenvalue measures under ergodicity, and relates the Lifschitz tails of the IDS to the left tails of the principal eigenvalues via comparison of the principal eigenvalue on large boxes with the bottom of the spectrum of the infinite-volume operator.

Significance. If the constructions hold, the work extends the spectral theory of Anderson Hamiltonians to singular potentials via quadratic-form methods that ensure self-adjointness, which is a standard and useful approach in the field. The IDS construction and the explicit tail relation supply concrete tools for analyzing low-energy behavior in models with rough disorder.

minor comments (2)
  1. [Setup section] Setup section: the precise integrability conditions on the random measures/distributions that guarantee the quadratic form is closed and the operator self-adjoint should be restated explicitly when the main theorems are formulated, rather than only in the preliminary setup.
  2. [IDS construction] Section on IDS: the ergodicity assumption on the potential field is invoked for the a.s. limit; a brief reminder of the precise stationarity/ergodicity hypothesis used would improve readability.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for the positive summary and significance assessment of our manuscript on Anderson Hamiltonians with singular potentials. We appreciate the recommendation for minor revision. As no specific major comments appear in the report, we have prepared no point-by-point responses below and will incorporate any minor changes as appropriate in the revised version.

Circularity Check

0 steps flagged

No significant circularity; direct construction via quadratic forms and ergodic limits

full rationale

The paper constructs Anderson Hamiltonians from a class of singular random potentials (random measures/distributions satisfying integrability for closed quadratic forms and self-adjointness). The IDS is the a.s. limit of empirical eigenvalue measures under standard ergodicity of the potential field. Lifschitz tails follow from spectral comparison between finite-box principal eigenvalues and the infinite-volume bottom spectrum. No self-definitional loops, no fitted parameters renamed as predictions, no load-bearing self-citations, and no ansatz smuggling. The chain relies on external tools (quadratic form theory, ergodic theorems) that are independent of the target results. This matches the default case of a self-contained mathematical construction.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

Abstract-only review yields no explicit free parameters, invented entities, or non-standard axioms; the work relies on standard background from probability and spectral theory for bounded domains and random fields.

axioms (1)
  • domain assumption The underlying probability space and the bounded domain admit a well-defined random potential from the stated general class.
    Implicit in the abstract's claim that the operators can be constructed on bounded domains.

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