Modulated Hubbard interaction realizes C=+2 many-body pump whose boundary spectral flow splits into distinct edge events with an intervening neutral spinful triplet excitation.
In a mean-field pump, the spin-up and spin-down edge modes cross the Fermi level simultane- ously
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Interaction-Split Edge Spectral Flow and Neutral Triplet Boundary Modes in a C = 2 Hubbard Pump
Modulated Hubbard interaction realizes C=+2 many-body pump whose boundary spectral flow splits into distinct edge events with an intervening neutral spinful triplet excitation.