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quant-ph2022★ 7 cited
Quantum circuit for measuring an operator's generalized expectation values and its applications to non-Hermitian winding numbers
Ze-Hao Huang, Peng He, Li-Jun Lang +1
We propose a general quantum circuit based on the swap test for measuring the quantity of an arbitrary operator with respect to two quantum stat…
quant-ph2022★ 18 cited
Extracting non-Abelian quantum metric tensor and its related Chern numbers
Hai-Tao Ding, Yan-Qing Zhu, Peng He +4
The complete geometry of quantum states in parameter space is characterized by the quantum geometric tensor, which contains the quantum metric and Berry curvature as the real and i…