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arXiv math/0011063math.OAhep-thmath.MGquant-ph
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量子度量空间的Gromov-Hausdorff距离

Gromov-Hausdorff Distance for Quantum Metric Spaces

Marc A. Rieffel

摘要:

量子度量空间指的是一个C^*-代数(或者更一般地说是一个序单位空间),它具有由普通度量定义的Lipschitz广义函数。我们发展了紧致量子度量空间的Gromov-Hausdorff距离。我们证明了经典理论的基本定理具有自然的量子类似物。我们的主要例子涉及量子环面$A_þ$。我们表明,对于一致定义的“度量”,如果一个参数序列$\{þ_n\}$收敛到一个参数$þ$,那么量子环面序列$\{A_{þ_n}\}$在量子Gromov-Hausdorff距离收敛到$A_þ$。

英文摘要:

By a quantum metric space we mean a C^*-algebra (or more generally an order-unit space) equipped with a generalization of the Lipschitz seminorm on functions which is defined by an ordinary metric. We develop for compact quantum metric spaces a version of Gromov-Hausdorff distance. We show that the basic theorems of the classical theory have natural quantum analogues. Our main example involves the quantum tori, $A_þ$. We show, for consistently defined ``metrics'', that if a sequence $\{þ_n\}$ of parameters converges to a parameter $þ$, then the sequence $\{A_{þ_n}\}$ of quantum tori converges in quantum Gromov-Hausdorff distance to $A_þ$.

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