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Encircling exceptional points as a non-Hermitian extension of rapid adiabatic passage
Juraj Feilhauer, Alexander Schumer, Jörg Doppler +5
The efficient transfer of excitations between different levels of a quantum system is a task with many applications. Among the various protocols to carry out such a state transfer…
Ab-initio Theory of Photoionization via Resonances
Adi Pick, Petra Ruth Kaprálová-Žďánská, Nimrod Moiseyev
We present an \emph{ab-initio} approach for computing the photoionization spectrum near autoionization resonances in multi-electron systems. While traditional (Hermitian) theories…
The effect of polarization on the propagation distance of leaky guided modes
Adi Pick, Nimrod Moiseyev
We show that transverse-magnetic (TM) leaky modes can propagate further than transverse electric (TE) modes in real-index dielectric waveguides. We compute the density of states an…
Light stops at exceptional points
Tamar Goldzak, Alexei A. Mailybaev, Nimrod Moiseyev
Almost twenty years ago the light was slowed down to less than of its vacuum speed in a cloud of ultracold atoms of sodium. Upon a sudden turn-off of the coupling laser,…
Dynamically encircling exceptional points in a waveguide: asymmetric mode switching from the breakdown of adiabaticity
Jörg Doppler, Alexei A. Mailybaev, Julian Böhm +7
Physical systems with loss or gain feature resonant modes that are decaying or growing exponentially with time. Whenever two such modes coalesce both in their resonant frequency an…