Wave-packet dynamics of Bogoliubov quasiparticles: Quantum metric effects
Wave-packet dynamics of Bogoliubov quasiparticles: Quantum metric effects
We study the dynamics of the Bogoliubov wave packet in superconductors and calculate the supercurrent carried by the wave packet. We discover an anomalous contribution to the supercurrent, related to the quantum metric of the Bloch wave function. This anomalous contribution is most important for flat or quasiflat bands, as …