Conductivity of quantum spin chains: A quantum Monte Carlo approach

被引：0
作者：
Alvarez, JV [1 ]
Gros, C [1 ]
机构：
[1] Univ Saarland, Fak 7, D-66041 Saarbrucken, Germany
来源：
PHYSICAL REVIEW B | 2002年 / 66卷 / 09期
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D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We discuss zero-frequency transport properties of various spin-1/2 chains. We show that a careful analysis of quantum Monte Carlo data on the imaginary axis allows to distinguish between intrinsic ballistic and diffusive transport. We determine the Drude weight, current-relaxation lifetime, and the mean free path for integrable and nonintegrable quantum spin chains. We discuss, in addition, some phenomenological relations between various transport-coefficients and thermal response functions.
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页数：9
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