6 citations · 13 across the 5 of their papers we have counts for
5 papers
Geometric origin of supercurrents in Berry phase: Formula for computing currents from wavefunctions with correlation and particle number variation
B. Q. Song, J. D. H. Smith, J. Wang
The complexity of itinerant and many-body nature in Bardeen-Cooper-Schrieffer (BCS) wavefunctions has traditionally led to the use of coarse-grained order parameters for describing…
Type-II pumping beyond resonance principle: From energetic to geometric rules
B. Q. Song, J. D. H. Smith, Y. X. Yao +1
Conventionally, pumping relies on energetic resonance: energy quanta matches the gap . Under linear approximation, this is known as the Fermi golden rule (FGR). Howev…
Quantum geometry embedded in unitarity of evolution: revealing its impacts as geometric oscillation and dephasing in spin resonance and crystal bands
B. Q. Song, J. D. H. Smith, T. Jiang +2
Quantum Hall effects provide intuitive ways of revealing the topology in crystals, i.e., each quantized "step" represents a distinct topological state. Here, we seek a counterpart…
Quantum Liouville's theorem based on Haar measure
B. Q. Song, J. D. H. Smith, L. Luo +1
Liouville theorem (LT) reveals robust incompressibility of distribution function in phase space, given arbitrary potentials. However, its quantum generalization, Wigner flow, is co…
Geometric pumping and dephasing at topological phase transition
B. Q. Song, J. D. H. Smith, L. Luo +1
A measure-preserving formalism (MPF) is constructed and applied to spin/band models, which yield observations about pumping. It occurs at topological phase transition (TPT), i.e.,…