The coupled normal mode method is a powerful approach for solving range-dependent propagation problems in underwater acoustics. An important area of study is to improve stability and efficiency so as ...

Increasing loss in one waveguide can counterintuitively enhance light transmission. Using the Heisenberg-Langevin formalism, we show that this loss-induced transparency effect extends to single-photon ...

Abstract: This paper introduces a novel extension to a scalar two-dimensional polynomial finite-element basis to better cope with wedge singularities in waveguide ...

Abstract: The traditional FEM can only calculate the reciprocal problem. Our new non-self-adjoint FEM can solve non-self-adjoint problem which contains inhomogeneous and anisotropic media where the ...