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arXiv 0903.2747math.DSmath-phmath.MPmath.SP
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部分可扩映射迁移算子谱隙的半经典起源

Semiclassical origin of the spectral gap for transfer operators of partially expanding map

Frédéric Faure

摘要:

本文考虑了环面上部分可扩映射的一个简单模型。我们研究的Ruelle转移算子的频谱,并表明,在高频率的限制在中性方向(这是一个半经典的限制),频谱开发的频谱间隙,为一个通用的地图。这一结果已由M. Tsujii(05).这里的新颖之处在于,我们使用半经典分析,它提供了一个不同的和相当自然的描述。我们证明了转移算子是一个半经典算子,在余切空间上具有定义良好的“经典动力学”。这种经典动力学有一个“陷阱集”,这是负责的Ruelle共振谱。特别是,我们表明,光谱间隙是密切相关的一个特定的动力学性质,这个被困集。

英文摘要:

We consider a simple model of partially expanding map on the torus. We study the spectrum of the Ruelle transfer operator and show that in the limit of high frequencies in the neutral direction (this is a semiclassical limit), the spectrum develops a spectral gap, for a generic map. This result has already been obtained by M. Tsujii (05). The novelty here is that we use semiclassical analysis which provides a different and quite natural description. We show that the transfer operator is a semiclassical operator with a well defined "classical dynamics" on the cotangent space. This classical dynamics has a "trapped set" which is responsible for the Ruelle resonances spectrum. In particular we show that the spectral gap is closely related to a specific dynamical property of this trapped set.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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