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arXiv 0812.4356math-phhep-thmath.MP
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指数为$\bf 1<α\leq 2$的弱耦合分数阶一维Schrodinger算子

The weakly coupled fractional one-dimensional Schrödinger operator with index $\bf 1<α\leq 2$

Agapitos N. Hatzinikitas

摘要:

我们研究的分数,一维Weyl算子$\hat{\mathcal{P}}^α$密集定义的希尔伯特空间$\mathcal{H}=L^2({\mathbb R},dx)$的基本性质,并确定的渐近行为的自由格林函数和它的变化相对于能量的束缚态。在续集中,我们指定的薛定谔算子$K_α\hat{\mathcal{P}}^α-g|\hat{V}|$的Birman-Schwinger表示和提取的有限秩的部分,这是必不可少的渐近展开的基态。最后,我们确定了小耦合常数$g$存在束缚态的充分必要条件。

英文摘要:

We study fundamental properties of the fractional, one-dimensional Weyl operator $\hat{\mathcal{P}}^α$ densely defined on the Hilbert space $\mathcal{H}=L^2({\mathbb R},dx)$ and determine the asymptotic behaviour of both the free Green's function and its variation with respect to energy for bound states. In the sequel we specify the Birman-Schwinger representation for the Schrödinger operator $K_α\hat{\mathcal{P}}^α-g|\hat{V}|$ and extract the finite-rank portion which is essential for the asymptotic expansion of the ground state. Finally, we determine necessary and sufficient conditions for there to be a bound state for small coupling constant $g$.

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