Recently it has been recognized that electronic conical intersections in molecular systems can be induced by laser light even in diatomics. As is known a direct consequence of these accidental degeneracies is the appearance of nonadiabatic effects which has a strong impact on the nuclear quantum dynamics. Studying the photodissociation process of the ${\mathrm{D}}_2$${}^{+}$ molecule, we report here some observable quantum interference phenomena that arise from the topological singularity induced by a strong laser field.

• Received 13 August 2013

DOI:https://doi.org/10.1103/PhysRevA.88.043413