Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 26: Ultracold Plasmas and Rydberg systems (joint session A/Q)
A 26.5: Vortrag
Mittwoch, 7. März 2018, 15:00–15:15, K 0.011
Multi-excitons in flexible Rydberg aggregates — •Ghassan Abumwis1,2 and Sebastian Wüster1,2,3 — 1mpipks, Dresden, Germany — 2Bilkent University, Ankara, Turkey — 3IISER, Bhopal, India
Flexible Rydberg aggregates are ensembles of Rydberg atoms that are allowed to move, they provide a platform to investigate quantum phenomena like energy transport and conical intersections. This can be achieved by doping the aggregate with an excitation, an excited state that is energetically higher but close to the primary Rydberg state, leading to the resonant dipole-dipole interaction becoming dominant. Consequently, the excitation is delocalized throughout the aggregate creating excitons.
We follow up on previous results and add a second excitation to the aggregate. We demonstrate that products of excitons can be used to express biexciton states for a chain with a dislocation at one end, a one-dimensional aggregate with equal spacing between atoms except for the last two. Moreover, we show that non-adiabatic effects can be made prominent in flexible Rydberg chains. Finally, we analyze the interaction between two excitation pulses based on the initial biexciton state and the presence of a dislocation. Our findings further enlarge the pool of Born-Oppenheimer surfaces for quantum transport that can be engineered in flexible Rydberg aggregates.