Absolutely Continuous Spectrum for the Quasi-periodic Schrdinger Operator in Exponential Regime
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abstract
Avila and Jitomirskaya prove that the quasi-periodic Schr"{o}dinger operator $H_{lambda v,alpha, heta}$ has purely absolutely continuous spectrum for $alpha $ in sub-exponential regime (i.e., $\beta(alpha)=0$) with small $lambda$, if $v$ is real analytic in a strip of real axis. In the present paper, we show that for all $alpha$ with $0<\beta(alpha)