Perfect transmission of Higgs modes via antibound states
Abstract
We study tunneling properties of Higgs modes in superfluid Bose gases in optical lattices in the presence of a potential barrier introduced by local modulation of hopping amplitude. Solving the time-dependent Ginzburg-Landau equation, Higgs modes are found to exhibit perfect transmission through a potential barrier if the barrier strength is weak. There exists, on the other hand, localized Higgs bound states in the presence of a strong potential barrier. We find that the perfect transmission disappears at the critical barrier strength above which one of the odd antibound state turns into a true bound state. We demonstrate that the perfect transmission of Higgs modes is mediated by resonance with the antibound states of Higgs modes.
Keywords
Cite
@article{arxiv.1906.11132,
title = {Perfect transmission of Higgs modes via antibound states},
author = {Takeru Nakayama and Shunji Tsuchiya},
journal= {arXiv preprint arXiv:1906.11132},
year = {2019}
}
Comments
7 pages, 4 figures