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arXiv 0705.2933math.OAmath-phmath.KTmath.MP
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规范等变Hilbert双模与自同态的交叉积

Gauge-equivariant Hilbert bimodules and crossed products by endomorphisms

Ezio Vasselli

摘要:

由具有非平凡中心的超选择结构产生的C*-自同态定义了一个“秩”和一个“第一陈类”。这种自同态的交叉积涉及具有上述秩和第一陈类的向量丛的Cuntz-Pimsner代数,并且可以用来构造抽象(非对称)张量范畴与作用于(非对称)希尔伯特双模的群丛的对偶。对偶对象的存在性和唯一性(即,“规范”群丛)不被确保:我们给出了与给定的自同态相关联的某个模空间方面的这种现象的描述。上述Hilbert双模是规范等变向量丛在Nistor-Troitsky意义下的非交换类似物。

英文摘要:

C*-endomorphisms arising from superselection structures with non-trivial centre define a 'rank' and a 'first Chern class'. Crossed products by such endomorphisms involve the Cuntz-Pimsner algebra of a vector bundle having the above-mentioned rank and first Chern class, and can be used to construct a duality for abstract (nonsymmetric) tensor categories vs. group bundles acting on (nonsymmetric) Hilbert bimodules. Existence and unicity of the dual object (i.e., the 'gauge' group bundle) are not ensured: we give a description of this phenomenon in terms of a certain moduli space associated with the given endomorphism. The above-mentioned Hilbert bimodules are noncommutative analogues of gauge-equivariant vector bundles in the sense of Nistor-Troitsky.

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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