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arXiv math-ph/9906009math-phmath.MP
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量子文法上的KMS态

KMS states on Quantum Grammars

V. A. Malyshev

摘要:

我们认为量子(酉)连续时间演化的自旋晶格连同量子演化的晶格本身。在物理学中,这样的演化是结合量子引力来讨论的。它也与所谓的量子线路有关,量子计算机的化身之一。我们考虑更简单的模型,可以得到精确的数学结果。我们证明了薛定谔和海森堡两种图像中动力学的存在性,在适当的C*-代数上构造了KMS态。我们表明(高温),对于每个系统的晶格经历量子演化,有一个自然的缩放导致一个量子自旋系统上的一个固定的晶格,定义由重整化的哈密顿量。

英文摘要:

We consider quantum (unitary) continuous time evolution of spins on a lattice together with quantum evolution of the lattice itself. In physics such evolution was discussed in connection with quantum gravity. It is also related to what is called quantum circuits, one of the incarnations of a quantum computer. We consider simpler models for which one can obtain exact mathematical results. We prove existence of the dynamics in both Schroedinger and Heisenberg pictures, construct KMS states on appropriate C*-algebras. We show (for high temperatures) that for each system where the lattice undergoes quantum evolution, there is a natural scaling leading to a quantum spin system on a fixed lattice, defined by a renormalized Hamiltonian.

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