Electronically excited cations, generated by inner-valence ionization of small molecules,
relax in general by dissociation and photon emission. Autoionization is forbidden for …

Spectral singularities are spectral points that spoil the completeness of the eigenfunctions of
certain non-Hermitian Hamiltonian operators. We identify spectral singularities of complex …

Light propagation in optical lattices of driven cold atoms exhibits non-Hermitian
degeneracies when the first-order modulation amplitudes of real and imaginary parts of the …

In open quantum systems where the effective Hamiltonian is not Hermitian, it is known that
the adiabatic (or instantaneous) basis can be multivalued: by adiabatically transporting an …

It is demonstrated that excited van der Waals systems can relax by electron emission via a
novel interatomic mechanism. The process is analyzed by means of extensive ab initio …

Porous silicon (PSi) is recognized as an attractive building block for photonic devices
because of its novel properties including high ratio of surface to volume and high light …

We show here that due to nonadiabatic couplings in decaying systems, applying the same
time-dependent protocol in the forward and reverse direction to the same mixed initial state …

We report on the experimental study of an exceptional point (EP) in a dissipative microwave
billiard with induced time-reversal invariance (T) violation. The associated two-state …

The typical avoided crossings for Hermitian quantum systems depending on parameters, the
diabolic crossing scenario, are generalized to the non-Hermitian case, eg for resonances …

We study theoretically the photodissociation dynamics of the H 2+ molecular ion exposed to
a linearly polarized laser light. It is shown that it is possible to choose a laser wavelength …