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arXiv 2610.20177math.SGhep-thmath.DG
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正拉格朗日量的量子化

Quantization of positive Lagrangians

Institute of Mathematics, Hebrew University(希伯来大学数学研究所)

Jake P. Solomon, Bentzion Yavetz

AI总结:

本研究针对近Calabi-Yau流形中的正拉格朗日子流形,利用量子化映射与Hörmander估计,证明相对Kähler类为有理斜率时其度量诱导路径度量,为拉格朗日子流形的量子化提供关键结果。

摘要:

近Calabi-Yau流形中的拉格朗日子流形若其上限制的全纯体积形式的实部为正则称为正的;若全纯体积形式的虚部与实部的限制比值被1/ε界定,则称为ε-正的。正拉格朗日子流形的恰当同痕类上存在自然的黎曼度量。我们证明,当环境Calabi-Yau流形的相对Kähler类位于有理斜率直线上时,限制在ε-正拉格朗日子集上的黎曼度量诱导出路径度量。该证明依赖于一系列量子化映射的构造:这些映射从正拉格朗日子流形空间上的圆丛映射到预量子线丛幂次的全纯截面空间的对偶空间。相对Kähler类的有理条件使我们可将问题约化到Bohr-Sommerfeld拉格朗日子流形的情形。基于Tian和Nirenberg-Wells的思想,我们使用Hörmander估计证明,Bohr-Sommerfeld拉格朗日子流形上的函数可被预量子线丛足够高次幂的全纯截面逼近。因此,量子化映射最终能分离圆丛的纤维。

英文摘要:

A Lagrangian submanifold in an almost Calabi-Yau manifold is called positive if the real part of the holomorphic volume form restricted to it is positive. It is called $ε$-positive if the ratio of the restrictions of the imaginary and real parts of the holomorphic volume form is bounded by $\frac{1}ε.$ An exact isotopy class of positive Lagrangian submanifolds admits a natural Riemannian metric. We prove that the Riemannian metric restricted to the subset of $ε$-positive Lagrangians induces a path metric when the relative Kähler class of the ambient Calabi-Yau manifold lies on a line of rational slope. The proof relies on the construction of a sequence of quantization maps from a circle bundle over the space of positive Lagrangians to the dual of the space of holomorphic sections of powers of a prequantum line bundle. The rationality condition for the relative Kähler class allows us to reduce to the case of Bohr-Sommerfeld Lagrangians. Building on ideas of Tian and Nirenberg-Wells, Hörmander estimates are used to show that functions on a Bohr-Sommerfeld Lagrangian can be approximated by holomorphic sections of a sufficiently high power of the prequantum line bundle. Consequently, the quantization maps eventually separate fibers of the circle bundle.

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