Berlin 2014 – scientific programme

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A: Fachverband Atomphysik

A 46: Atomic collisions and ultracold plasmas

A 46.4: Talk

Thursday, March 20, 2014, 17:15–17:30, BEBEL E34

Switching exciton pulses through conical intersections — •Karsten Leonhardt, Sebastian Wüster, and Jan Michael Rost — Max Planck Institute for the Physics of Complex Systems

Exciton pulses transport excitation and entanglement adiabatically through Rydberg aggregates [1], assemblies of highly excited light atoms, which are set into directed motion by resonant dipole-dipole interaction [1-4]. Here, we demonstrate the coherent splitting of such pulses as well as the spatial segregation of electronic excitation and atomic motion [5]. Both mechanisms exploit local non-adiabatic effects at a conical intersection, turning them from a decoherence source into an asset. The intersection provides a sensitive knob controlling the propagation direction and coherence properties of exciton pulses.
References


	[1]	C. Ates, A. Eisfeld, J-M. Rost, New. J. Phys. 10, 045030 (2008).
	[2]	S. Wüster, C. Ates, A. Eisfeld, J-M. Rost,
		Phys. Rev. Lett. 105, 195392 (2010).
	[3]	S. Möbius, S. Wüster, C. Ates, A. Eisfeld, J-M. Rost,
		J. Phys. B. 44, 184011 (2011).
	[4]	S. Wüster, A. Eisfeld, J-M. Rost,
		Phys. Rev. Lett. 106, 153002 (2011).
	[5]	K. Leonhardt, S. Wüster, J.-M. Rost,
		ArXiv e-prints 1310, 6975 (2013).