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quant-ph2021
Quantized single-particle Thouless pump induced by topology transfer from a Chern insulator at finite temperature
Lukas Wawer, Razmik Unanyan, Michael Fleischhauer
Quantized particle or spin transport upon cyclic parameter variations, determined by topological invariants, is a key signature of Chern insulators in the ground state. While measu…
quant-ph2021
Chern number and Berry curvature for Gaussian mixed states of fermions
Lukas Wawer, Michael Fleischhauer
We generalize the concept of topological invariants for mixed states based on the ensemble geometric phase (EGP) introduced for one-dimensional lattice models to two dimensions. In…