title: Gate controlled resonant widths in double-bend waveguides: bound states in the continuum.
abstract: We consider quantum transmission through double-bend [Formula: see text]- and Z-shaped waveguides controlled by the finger gate potential. Using the effective non-Hermitian Hamiltonian approach we explain the resonances in transmission. We show a difference in transmission in the short waveguides that is the result of different chirality in Z and [Formula: see text] waveguides. We demonstrate that the potential selectively affects the resonant widths resulting in the occurrence of bound states in the continuum.
authors.affiliation: Kirensky Institute of Physics Siberian Branch of Russian Academy of Sciences, 660036, Krasnoyarsk, Russia.
authors.forename: Almas F
authors.initials: AF
authors.lastname: Sadreev
authors.forename: Dmitrii N
authors.initials: DN
authors.lastname: Maksimov
authors.forename: Artem S
authors.initials: AS
authors.lastname: Pilipchuk