Floquet isospectrality for periodic graph operators
Floquet isospectrality for periodic graph operators
复制标题
周期图算子的 Floquet 同谱性
DOI:
10.1016/j.jde.2023.08.009
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发表时间:
2023
影响因子:
2.4
通讯作者:
Liu, Wencai
中科院分区:
文献类型:
--
作者:
Liu, Wencai
Abstract Let Γ= q 1 Z⊕ q 2 Z⊕⋯⊕ q d Z with arbitrary positive integers q l, l= 1, 2,⋯, d. Let Δ discrete+ V be the discrete Schrödinger operator on Z d, where Δ discrete is the discrete Laplacian on Z d and the function V: Z d→ C is Γ-periodic. We prove two rigidity theorems for discrete periodic Schrödinger operators:(1) If for real-valued Γ-periodic functions V and Y, the operators Δ discrete+ V and Δ discrete+ Y are Floquet isospectral and Y is separable, then V is separable.(2) If for complex-valued Γ-periodic functions V and Y, the operators Δ discrete+ V and Δ discrete+ Y are Floquet isospectral, and both V=⨁ j= 1 r V j and Y=⨁ j= 1 r Y j are separable functions, then, up to a constant, lower dimensional decompositions V j and Y j are Floquet isospectral, j= 1, 2,⋯, r. Our theorems extend the results of Kappeler. Our approach is developed from the author's recent work on Fermi isospectrality and can be applied to studying more general lattices.
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DOI:
10.1090/s0002-9947-1989-0961624-6
发表时间:
1989
影响因子:
1.3
作者:
T. Kappeler
通讯作者:
T. Kappeler
DOI:
10.3929/ethz-a-000579584
发表时间:
1988
期刊:
arXiv: Mathematical Physics
影响因子:
--
作者:
D. Bättig
通讯作者:
D. Bättig
影响因子:
1.3
作者:
Liu, Wencai
通讯作者:
Liu, Wencai
影响因子:
1.3
作者:
Kuchment, Peter
通讯作者:
Kuchment, Peter
影响因子:
2.4
作者:
P. Kuchment;B. Vainberg
通讯作者:
B. Vainberg