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arXiv 2201.10205math-phmath.FAmath.MPmath.SPquant-ph
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自伴扩张格式及其在量子哈密顿量中的现代应用

Self-adjoint extension schemes and modern applications to quantum Hamiltonians

Matteo Gallone, Alessandro Michelangeli

AI总结:

本书系统阐述Hilbert空间中稠定对称算子的自伴闭包与自伴扩张分类理论,并展示其在量子哈密顿量、谱与散射分析中的现代应用。

摘要:

本专著收录并扩充了两位作者近年来在本科和研究生课程及研讨班授课讲义中经过修订的材料,主题在抽象算子理论及量子力学应用中均处于核心地位:判定Hilbert空间上给定的稠定对称算子是否具有唯一的自伴实现,即其算子闭包;或者相反,它是否允许无穷多个不同的自伴扩张,并在后一种情形下对这些扩张进行分类,刻画其主要特征(算子定义域、二次型定义域、谱等)。这同时是一个非常经典且体系成熟的领域,构成专著的第一部分;也是一个具有新颖现代应用的领域,专著第二部分深入呈现了其中一组应用,其选择显然在某种程度上带有主观性,但也遵循教学标准。书中讨论了当今数学物理中受到新关注或重新关注的若干模型,特别是从自伴实现某些重要算子、将其自伴扩张分类为实际量子哈密顿量、研究其谱性质和散射性质等角度展开;同时也讨论了本身具有理论意义的中间技术问题,例如刻画相应的算子闭包和伴随算子。

英文摘要:

This monograph contains revised and enlarged materials from previous lecture notes of undergraduate and graduate courses and seminars delivered by both authors over the last years on a subject that is central both in abstract operator theory and in applications to quantum mechanics: to decide whether a given densely defined and symmetric operator on Hilbert space admits a unique self-adjoint realisation, namely its operator closure, or whether instead it admits an infinite multiplicity of distinct self-adjoint extensions, and in the latter case to classify them and characterise their main features (operator and quadratic form domains, spectrum, etc.) This is at the same time a very classical, well established field, corresponding to the first part of the monograph, and a territory of novel, modern applications, a selection of which, obviously subjective to some extent, but also driven by a pedagogical criterion, is presented in depth in the second part. A number of models are discussed, which are receiving today new or renewed interest in mathematical physics, in particular from the point of view of realising certain operators of interests self-adjointly, classifying their self-adjoint extensions as actual quantum Hamiltonians, studying their spectral and scattering properties, and the like, but also from the point of view of intermediate technical questions that have theoretical interest per se, such as characterising the corresponding operator closures and adjoints.

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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