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arXiv 1012.0403cond-mat.stat-mechcond-mat.str-el
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不可解量子自旋链中的Drude重量

Drude weight in non solvable quantum spin chains

Giuseppe Benfatto, Vieri Mastropietro

摘要:

对于量子自旋链或一维费米子系统,我们证明了Drude重量D验证了普适的Luttinger液体关系式$v_s^2=D/κ$,其中$κ$是磁化率,$v_s$是费米速度.这一结果用严格的重整化群方法得到了证明,并且对任何弱相互作用系统都是成立的,不管它的可积性如何。本文结合同一作者以前的一篇论文,完成了对这类系统的Luttinger液体猜想的证明。

英文摘要:

For a quantum spin chain or 1D fermionic system, we prove that the Drude weight D verifies the universal Luttinger liquid relation $v_s^2=D/κ$, where $κ$ is the susceptibility and $v_s$ is the Fermi velocity. This result is proved by rigorous Renormalization Group methods and is true for any weakly interacting system, regardless its integrablity. This paper, combined with a previous paper of the same authors, completes the proof of the Luttinger liquid conjecture for such systems.

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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