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arXiv 1605.04546math-phcond-mat.stat-mechmath.FAmath.MPmath.OAquant-ph
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Cayley树上Ising型量子马尔可夫链的相变

Phase transitions for Quantum Markov Chains associated with Ising type models on a Cayley tree

Farrukh Mukhamedov, Abdessatar Barhoumi, Abdessatar Souissi

摘要:

本文的主要目的是证明Cayley树上Ising型模型的量子马尔可夫链(QMC)方案中相变的存在性。请注意,这种模型没有一维的类似,即所考虑的模型只在树上持久。在本文中,我们提供了一个更一般的前向QMC的结构。在该构造中,QMC被定义为具有边界条件的有限体积状态的弱极限,即QMC取决于边界条件。我们的主要结果表明,存在一个相变的伊辛模型与竞争相互作用的Cayley树的顺序二。相变是指存在两个不同的QMC,它们不是准等价的,并且它们的支集不重叠。我们还研究了该模型的无序相的一些代数性质,这在经典环境中也是一种新的现象。

英文摘要:

The main aim of the present paper is to prove the existence of a phase transition in quantum Markov chain (QMC) scheme for the Ising type models on a Cayley tree. Note that this kind of models do not have one-dimensional analogous, i.e. the considered model persists only on trees. In this paper, we provide a more general construction of forward QMC. In that construction, a QMC is defined as a weak limit of finite volume states with boundary conditions, i.e. QMC depends on the boundary conditions. Our main result states the existence of a phase transition for the Ising model with competing interactions on a Cayley tree of order two. By the phase transition we mean the existence of two distinct QMC which are not quasi-equivalent and their supports do not overlap. We also study some algebraic property of the disordered phase of the model, which is a new phenomena even in a classical setting.

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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