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quant-ph2025★ 2 cited
Direct measurement of the quantum geometric tensor in pseudo-Hermitian systems
Ze-Hao Huang, Hai-Tao Ding, Li-Jun Lang
The quantum geometric tensor (QGT) fundamentally encodes the geometry and topology of quantum states in both Hermitian and non-Hermitian regimes. While adiabatic perturbation theor…
quant-ph2022★ 11 cited
Nonlinear perturbation of a high-order exceptional point: skin discrete breathers and the hierarchical power-law scaling
Hui Jiang, Enhong Cheng, Ziyu Zhou +1
We study the nonlinear perturbation of a high-order exceptional point (EP) of the order equal to the system site number in a Hatano-Nelson model with unidirectional hopping and…