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arXiv 2108.08141math.APmath.DS
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多项式时间准周期微扰下一维量子谐振子Sobolev范数的增长性

Growth of Sobolev Norms in 1-d Quantum Harmonic Oscillator with Polynomial Time Quasi-periodic Perturbation

Jiawen Luo, Zhenguo Liang, Zhiyan Zhao

摘要:

考虑一维量子谐振子受线性算符扰动的情形,线性算符是$(x,-{\rm i}\partial_x)$中的$2$次多项式,其系数随时间准周期变化。通过建立约化结果,我们描述了Sobolev范数的增长性。特别地,如果将原时间拟周期方程约化为常数Stark哈密顿量,则在该模型中观察到${\mathcal H}^s-$范数的$t^{2s}-$多项式增长.

英文摘要:

We consider the one-dimensional quantum harmonic oscillator perturbed by a linear operator which is a polynomial of degree $2$ in $(x,-{\rm i}\partial_x)$, with coefficients quasi-periodically depending on time. By establishing the reducibility results, we describe the growth of Sobolev norms. In particular, the $t^{2s}-$polynomial growth of ${\mathcal H}^s-$norm is observed in this model if the original time quasi-periodic equation is reduced to a constant Stark Hamiltonian.

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