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Direct Imaging of Laser-driven Ultrafast Molecular Rotation

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Published on: February 4, 2017

Switching Exciton Pulses Through Conical Intersections.

K Leonhardt¹, S Wüster¹, J M Rost¹

¹Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, 01187 Dresden, Germany.

Physical Review Letters

|December 11, 2014

Summary

This summary is machine-generated.

Exciton pulses coherently split and separate excitation from motion in Rydberg aggregates. Nonadiabatic effects at conical intersections control exciton pulse propagation and coherence in dynamic atomic networks.

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Area of Science:

Quantum physics
Atomic physics
Condensed matter physics

Background:

Exciton pulses mediate energy and entanglement transfer in Rydberg aggregates.
Directed motion of atoms is driven by resonant dipole-dipole interactions.

Purpose of the Study:

To demonstrate coherent splitting of exciton pulses.
To achieve spatial segregation of electronic excitation and atomic motion.
To utilize nonadiabatic effects at conical intersections for control.

Main Methods:

Investigating exciton dynamics in Rydberg aggregates.
Exploiting local nonadiabatic effects at conical intersections.
Controlling exciton pulse propagation and coherence properties.

Main Results:

Coherent splitting of exciton pulses was demonstrated.
Spatial segregation of electronic excitation and atomic motion was achieved.
Conical intersections were shown to control propagation direction and coherence.

Conclusions:

Nonadiabatic effects at conical intersections can be harnessed, not just sources of decoherence.
Sensitive control over exciton pulse propagation and coherence is possible.
The findings have broad implications for excitons in dynamic networks.