Speaker:Zhou Qi,Professor of Chen Xingshen Institute of Mathematics, Nankai University

Date:Nov.18, 2021

Time:15:00-15:50

Location:Lecture Hall 924, Block B, Zhixin Building, Central Campus

Sponsor:School of Mathematics, Shandong University

Abstract:

We explore Avila's global theory for one-frequency Schrödinger operators from the point of view of Aubry duality. We establish the one-to-one correspondence between the Lyapunov exponent of the Schrödinger cocycles and the Lyapunov exponents of its dual cocycles. We also give a new equivalent definition of subcritical, critical, supercritical regimes. Especially, we prove that the acceleration of the Schrödinger cocycle equals to the pair of zero Lyapunov exponents of its dual cocycle. Finally, we talk about its physical application.

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https://www.view.sdu.edu.cn/info/1020/159383.htm