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arXiv 1107.2618cond-mat.stat-mechhep-lat
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从共形不变性到准定态

From conformal invariance to quasistationary states

Francisco C. Alcaraz, Vladimir Rittenberg

摘要:

在一个共形不变的一维随机模型中,一个特定的非局部扰动使系统进入一个新的无质量相。系统的基态为吸附态。演化哈密顿量的有限尺寸标度谱的一部分保持不变,但某些能级随着大晶格尺寸变得与基态简并而指数地趋于零。作为一个结果,人们观察到的外观的准定态,有一个弛豫时间的指数增长的系统的大小。几个初始条件已经挑出一个准稳态,它在有限尺寸标度限制下具有与共形不变模型的稳态相同的性质。

英文摘要:

In a conformal invariant one-dimensional stochastic model, a certain non-local perturbation takes the system to a new massless phase of a special kind. The ground-state of the system is an adsorptive state. Part of the finite-size scaling spectrum of the evolution Hamiltonian stays unchanged but some levels go exponentially to zero for large lattice sizes becoming degenerate with the ground-state. As a consequence one observes the appearance of quasistationary states which have a relaxation time which grows exponentially with the size of the system. Several initial conditions have singled out a quasistationary state which has in the finite-size scaling limit the same properties as the stationary state of the conformal invariant model.

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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