一维移动杂质中的竞争运动机制
量子气体
2016-12-14 v2
摘要
我们表明，零温下一维多体态中的可区分移动杂质通常不表现为准粒子 (QP)。相反，由于产生了发散数量的零能激发，杂质动力学以及浴的基态都发生了根本性转变，导致了我们所谓的红外主导 (ID) 动力学。结合解析方法与 DMRG 数值模拟，我们给出了零动量下支配 ID 动力学的幂律通用公式，讨论了准粒子动力学可能再次出现的阈值，并研究了在较大杂质动量下 ID 与准粒子普适类之间的竞争。
引用
@article{arxiv.1311.1825,
title = {Competing regimes of motion in 1D mobile impurities},
author = {Adrian Kantian and Ulrich Schollwöck and Thierry Giamarchi},
journal= {arXiv preprint arXiv:1311.1825},
year = {2016}
}
备注
4+ pages, 3 figures. Title has been changed in response to editorial comments. Abstract has been reworked. Main text has been significantly restructured and figures reworked. 4+ pages Supplementary Materials have been added, including 3 additional figures