利用光驱动激活固体中的多体局域化
Activating many-body localization in solids by driving with light
摘要：
由于声子的存在，在无序固体中不会发生多体局域化（MBL），即使无序很强。局部守恒定律描述了由于声子耦合引起的MBL相位衰减。在这里，我们表明，这种衰减可以补偿时，系统被赶出平衡。所得到的局部温度的变化提供了底层MBL相的特征指纹。本文研究了弱耦合于声子池的一维无序自旋链在弱白光照射下的运动。在各态历经阶段，辐照效应很弱。然而，如果系统是在MBL相辐射诱导强烈的温度变化的顺序1，尽管耦合到声子。温度变化可以类似于序参量用于检测MBL相位、相变和MBL相关长度。
英文摘要：
Due to the presence of phonons, many body localization (MBL) does not occur in disordered solids, even if disorder is strong. Local conservation laws characterizing an underlying MBL phase decay due to the coupling to phonons. Here we show that this decay can be compensated when the system is driven out of equilibrium. The resulting variations of the local temperature provide characteristic fingerprints of an underlying MBL phase. We consider a one-dimensional disordered spin-chain which is weakly coupled to a phonon bath and weakly irradiated by white light. The irradiation has weak effects in the ergodic phase. However, if the system is in the MBL phase irradiation induces strong temperature variations of order 1 despite the coupling to phonons. Temperature variations can be used similar to an order parameter to detect MBL phases, the phase transition and an MBL correlation length.
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