Explanation of Superfluidity Using the Berry Connection for Many-Body Wave Functions
Superconductivity
2020-01-22 v2 Quantum Gases
Abstract
We show that two phenomena of superfluidity, superfluidity of weakly interacting bosons and superconductivity of the BCS model, are unified using the collective mode arising from the Berry connection for many-body wave functions. The superfluidity is attributed to the presence of this mode, which is stabilized by the interaction between particles that causes fluctuations of the number of particles participating in it. It is suggested that the existence of this collective mode and its stabilization is more fundamental to the occurrence of superconductivity than the electron-pair formation.
Keywords
Cite
@article{arxiv.1912.04529,
title = {Explanation of Superfluidity Using the Berry Connection for Many-Body Wave Functions},
author = {Hiroyasu Koizumi},
journal= {arXiv preprint arXiv:1912.04529},
year = {2020}
}