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Localization of One-Dimensional Random Band Matrices

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arxiv 2508.05802 v2 pith:EXMIPI6I submitted 2025-08-07 math.PR math-phmath.MP

Localization of One-Dimensional Random Band Matrices

classification math.PR math-phmath.MP
keywords matricesbandrandomarxivclassbandwidthcombinedconjectured
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

We consider a general class of $n\times n$ random band matrices with bandwidth $W$. When $W^2\ll n$, we prove that with high probability the eigenvectors of such matrices are localized and decay exponentially at the sharp scale $W^2$. Combined with the delocalization results of Yau and Yin [arXiv:2501.01718] and of Erd\H{o}s and Riabov [arXiv:2506.06441], this establishes the conjectured localization-delocalization transition for a large class of random band matrices.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. On a Rosenzweig-Porter-type model

    math-ph 2026-07 unverdicted novelty 8.0

    Provides uniform local laws and localization analysis for the general Rosenzweig-Porter model H = H0 + λW, generalizing previous results on deformed Wigner matrices.

  2. Localization Lengths of Power-Law Random Band Matrices

    math.PR 2026-04 unverdicted novelty 8.0

    The paper establishes rigorous lower bounds on eigenvector localization lengths for power-law random band matrices in four regimes of the decay exponent α, verifying a physical conjecture via new resolvent techniques.

  3. On a Rosenzweig-Porter-type model

    math-ph 2026-07 accept novelty 7.0

    Uniform single- and two-resolvent local laws for arbitrary deformations of Wigner matrices yield ETH and localization profiles for all λ and H0.

  4. Gradual eigenvector ergodization in coupled Ginibre matrices

    math-ph 2026-04 unverdicted novelty 7.0

    Explicit large-N asymptotic formula for gradual eigenvector ergodization in two coupled Ginibre matrices, plus vanishing of eigenvalue density at the origin beyond critical scaled coupling |tilde c|=1.

  5. Characteristic polynomials of non-Hermitian random band matrices near the threshold

    math-ph 2026-04 unverdicted novelty 6.0

    The second correlation function of characteristic polynomials for non-Hermitian random band matrices is studied asymptotically in the critical regime W proportional to sqrt(N) as N and W tend to infinity.