Domain-wall melting as a probe of many-body localization
  Motivated by a recent optical-lattice experiment by Choi et al.[Science 352, 1547 (2016)], we discuss how domain-wall melting can be used to investigate many-body localization. First, by considering noninteracting fermion models, we demonstrate that experimentally accessible measures are sensitive to localization and can thus be used to detect the delocalization-localization transition, including divergences of characteristic length scales. Second, using extensive time-dependent density matrix renormalization group simulations, we study fermions with repulsive interactions on a chain and a two-leg ladder. The extracted critical disorder strengths agree well with the ones found in existing literature. 
Johannes Hauschild, Fabian Heidrich-Meisner, Frank Pollmann
cond-mat.quant-gas cond-mat.dis-nn cond-mat.stat-mech cond-mat.str-el