arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.08598cond-mat.str-elcond-mat.mes-hallcond-mat.quant-gasphysics.chem-ph
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量子多体相互作用和莫特绝缘体跃迁的二维相干光谱直接超快探测

Direct and ultrafast probing of quantum many-body interaction and Mott-insulator transition through coherent two-dimensional spectroscopy

Nguyen Thanh Phuc, Pham Quang Trung

摘要:

量子多体系统中粒子之间的相互作用在决定系统的电、磁、光和热性质方面起着至关重要的作用。激光脉冲技术的最新进展使超快时间尺度上的物理性质的操纵和测量成为可能。在这里,我们提出了一种通过相干二维(2D)光谱直接和超快探测量子多体相互作用的方法。到一个中等的相互作用强度,粒子间的相互作用表现在非对角峰的出现在2D光谱之前,所有的峰合并成一个单一的对角峰,系统接近莫特绝缘相在强相互作用的制度。作为第二和第三激光脉冲之间的时间延迟的函数的2D光谱的演变可以提供关于相互作用的超快时间变化的重要信息。

英文摘要:

Interactions between particles in quantum many-body systems play a crucial role in determining the electric, magnetic, optical, and thermal properties of the system. The recent progress in the laser-pulse technique has enabled the manipulations and measurements of physical properties on ultrafast timescales. Here, we propose a method for the direct and ultrafast probing of quantum many-body interaction through coherent two-dimensional (2D) spectroscopy. Up to a moderate interaction strength, the inter-particle interaction manifests itself in the emergence of off-diagonal peaks in the 2D spectrum before all the peaks coalesce into a single diagonal peak as the system approaches the Mott-insulating phase in the strongly interacting regime. The evolution of the 2D spectrum as a function of the time delay between the second and third laser pulses can provide important information on the ultrafast time variation of the interaction.

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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