Discrete Bethe–Sommerfeld Conjecture
Discrete Bethe–Sommerfeld Conjecture
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离散贝特-索末菲猜想
DOI:
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发表时间:
2017
期刊:
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通讯作者:
S. Jitomirskaya
中科院分区:
文献类型:
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作者:
R. Han;S. Jitomirskaya
In this paper, we prove a discrete version of the Bethe–Sommerfeld conjecture. Namely, we show that the spectra of multi-dimensional discrete periodic Schrödinger operators on $${\mathbb{Z}^d}$$Zd lattice with sufficiently small potentials contain at most two intervals. Moreover, the spectrum is a single interval, provided at least one of the periods is odd, and can have a gap whenever all periods are even.