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arXiv 2312.04892cond-mat.str-elcond-mat.mes-hallcond-mat.othercond-mat.supr-conquant-ph
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通过有质动力势对多体态进行Floquet工程

Floquet engineering of many-body states by the ponderomotive potential

Zhiyuan Sun

AI总结:

本文将单粒子有质动力势推广到周期性驱动的量子多体系统,提出利用光诱导的有质动力势设计非平衡稳态,并展示了其在诱导激子凝聚、超导吸引相互作用及创造额外自由能极小值方面的应用。

摘要:

有质动力是粒子在振荡场中感受到的一种有效静态力,其静态势可称为有质动力势。我们将这一概念推广到周期性驱动的量子多体系统,并提出将其作为一种便捷工具,用于在超越单粒子层面设计非平衡稳态。应用于光驱动的材料时,有质动力势与平衡态光学电导率密切相关,后者在共振附近会增强。我们证明,来自入射光的有质动力势可用于在半导体中诱导激子凝聚,在某些电子-声子系统中产生导致超导的吸引相互作用,并在具有电荷/自旋/激子序的系统中创造额外的自由能极小值。这些效应均以实验相关参数呈现。

英文摘要:

The ponderomotive force is an effective static force that a particle feels in an oscillating field, whose static potential may be called the ponderomotive potential. We generalize this notion to periodically driven quantum many-body systems, and propose it as a convenient tool to engineer their non-equilibrium steady states beyond the single particle level. Applied to materials driven by light, the ponderomotive potential is intimately related to the equilibrium optical conductivity, which is enhanced close to resonances. We show that the ponderomotive potential from the incident light may be used to induce exciton condensates in semiconductors, to generate attractive interactions leading to superconductivity in certain electron-phonon systems, and to create additional free energy minima in systems with charge/spin/excitonic orders. These effects are presented with experimentally relevant parameters.

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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