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Photoinduced Tomonaga-luttinger-like Liquid In A Mott Insulator

机译:莫特绝缘子中的光诱导性Tomonaga-lutterer样液体

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摘要

Photoinduced metallic states in a Mott insulator are studied for the half-filled one-dimensional Hubbard model with the time-dependent density-matrix renormalization group. An irradiation of strong ac fields is found to create, in the nonequilibrium steady state, a linear dispersion in the optical spectrum (current-current correlation) reminiscent of the Tomonaga-Luttinger liquid for the doped Mott insulator in equilibrium. The spin spectrum in nonequilibrium retains the des Cloizeaux-Pearson mode with the spin velocity differing from the charge velocity. The mechanism of the photocarrier doping, along with the renormalization in the charge velocity, is analyzed in terms of an effective Dirac model.
机译:针对具有时间依赖密度矩阵重归一化组的半填充一维Hubbard模型,研究了Mott绝缘子中的光诱导金属态。发现在非平衡稳态下,强交流场的照射会在光谱中产生线性色散(电流-电流相关性),让人联想到平衡状态下掺杂的Mott绝缘子的Tomonaga-Luttinger液体。非平衡态的自旋谱保留了des Cloizeaux-Pearson模式,其自旋速度与电荷速度不同。根据有效的狄拉克模型,分析了光载流子掺杂的机理以及电荷速度的重新归一化。

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