The Quantum Geometric Tensor in a Parameter-Dependent Curved Space [PDF]
Entropy, 2022 We introduce a quantum geometric tensor in a curved space with a parameter-dependent metric, which contains the quantum metric tensor as the symmetric part and the Berry curvature corresponding to the antisymmetric part.
Joan A. Austrich-Olivares +1 more
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Observation of Berry curvature in non-Hermitian system from far-field radiation [PDF]
Nature CommunicationsBerry curvature that describes local geometrical properties of energy bands can elucidate many fascinating phenomena in solid-state, photonic, and phononic systems, given its connection to global topological invariants such as the Chern number.
Xuefan Yin +5 more
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Quantum geometry quadrupole-induced third-order nonlinear transport in antiferromagnetic topological insulator MnBi2Te4 [PDF]
Nature CommunicationsThe study of quantum geometry effects in materials has been one of the most important research directions in recent decades. The quantum geometry of a material is characterized by the quantum geometric tensor of the Bloch states.
Hui Li +9 more
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Thermoelectric Transport Driven by the Hilbert–Schmidt Distance [PDF]
Advanced ScienceThe geometric characteristics of Bloch wavefunctions play crucial roles in the properties of electronic transport. Within the Boltzmann equation framework, we demonstrate that the thermoelectric performance of materials is significantly influenced by the
Chang‐geun Oh +2 more
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Intertwined space-time symmetry, orbital magnetism, and dynamical Berry connection in a circularly shaken optical lattice [PDF]
Physical Review A, 2021 We study the circular shaking of a two dimensional optical lattice, which is essentially a (2+1) dimensional space-time lattice exhibiting periodicities in both spatial and temporal dimensions. The near-resonant optical shaking considered here dynamically couples the low-lying $s$ band and the first excited $p$ bands by transferring a photon of shaking
Hua Chen, W. Vincent Liu
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Complex Berry curvature and complex energy band structures in non-Hermitian graphene model
AAPPS Bulletin, 2022 Non-Hermitian quantum systems exhibit many novel physical properties of quantum states. We consider a non-Hermtian graphene model based on the tight-binding approximation with the coupling of the graphene and the substrate.
Chao Wu, Annan Fan, Shi-Dong Liang
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Extracting the quantum geometric tensor of an optical Raman lattice by Bloch-state tomography
Physical Review Research, 2023 In Hilbert space, the geometry of the quantum state is identified by the quantum geometric tensor (QGT), whose imaginary part is the Berry curvature and whose real part is the quantum metric tensor.
Chang-Rui Yi +8 more
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Field-induced Berry connection and anomalous planar Hall effect in tilted Weyl semimetals
Physical Review Research, 2023 We propose the linear and nonlinear anomalous planar Hall effect (APHE) in tilted Weyl semimetals in the presence of an in-plane magnetic and electric field, where the field-induced Berry connection plays a key role.
YuanDong Wang, Zhen-Gang Zhu, Gang Su
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Topological Edge States of a Majorana BBH Model
Condensed Matter, 2021 We investigate a Majorana Benalcazar–Bernevig–Hughes (BBH) model showing the emergence of topological corner states. The model, consisting of a two-dimensional Su–Schrieffer–Heeger (SSH) system of Majorana fermions with π flux, exhibits a non-trivial ...
Alfonso Maiellaro, Roberta Citro
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The Innovation, 2023 The modulation of topological electronic state by an external magnetic field is highly desired for condensed-matter physics. Schemes to achieve this have been proposed theoretically, but few can be realized experimentally.
Jianlei Shen +17 more
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