Mainz 2017 – scientific programme

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MO: Fachverband Molekülphysik

MO 6: Theory of Molecular Dynamics

MO 6.2: Talk

Tuesday, March 7, 2017, 11:30–11:45, N 25

Interference stabilization for discrete states coupled to a number of continua — •Nicola Mayer, Oleg Kornilov, and Misha Ivanov — Max Born Institute, Max-Born-Straβe 2A, 12489 Berlin, Germany

When two discrete states coupled to a common continuum overlap in energy, a counterintuitive quantum mechanical effect, commonly known as interference stabilization [1] or interference narrowing, manifests itself by stabilizing one of the two states as the coupling strength to the continuum increases. The effect was first proposed and studied for laser-dressed Rydberg states. In our recent work we demonstrated that interference stabilization also takes place in auto-ionizing states of N2 molecule using a time- and angular-resolved photoelectron spectroscopy experiment [2] [3]. Here we generalize the theory of Ref. [3] for an arbitrary number of continua coupled to two states and tackle the problem of three or more states coupled to two or more continua, drawing analogies with the Stimulated Raman Adiabatic Passage (STIRAP) effect, in search for possible geometric-phase-induced effects on the populations of the states.

Reference:

[1] M.V. Fedorov, Atomic and free electrons in a strong light field. Word Scientific, 1998.

[2] M. Eckstein, et al., Phys. Rev. Lett., 116, 153003, 2016.

[3] M. Eckstein, N. Mayer et al., Faraday Discuss., DOI: 10.1039/C6FD00093B, 2016.