Lei Geng

Sep 3, 2024 | link.aps.org | Lei Geng |XiuLan Liu |Jianing Zhang |Liang-You Peng

We investigate the anomalous photoinduced band renormalization in correlated materials, exemplified by the case of Ta2NiSe5. The manifestation of this anomaly is characterized by the alternating direction of band shift in response to changes in the laser parameters or electron momentum. We attribute the phenomena to the band inversion of the material and the selective excitation of a high-lying flat band, leading to the competition between the Hartree shift and the order collapse.

Jan 29, 2024 | mdpi.com | Lei Geng |Ningning Wang |Tao Wu |Zhiling Yuan

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Apr 24, 2023 | link.aps.org | Lin Cheng |Beijing Academy |Lei Geng |Sheng-Chen Liu

Abstract To implement a scalable and fault-tolerant programmable quantum computing architecture, the realization of high-fidelity, robust, and efficient quantum entangling gates in a multiqubit system is an essential requirement. In this paper, we consider the optimization of the segmented amplitude-modulated entangling gates realized by applying spin-dependent forces to a chain of ions trapped in a hybrid quadratic and quartic potential.