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Rostock 2019 – scientific programme

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MO: Fachverband Molekülphysik

MO 14: Ultrafast Multidimensional and Control Approaches

MO 14.8: Talk

Wednesday, March 13, 2019, 15:45–16:00, S HS 001 Biologie

Quantum Control with Quantum Light of Non-Adiabaticity in MoleculesAndrás Csehi1, Gábor J. Halász1, Ágnes Vibók1 und •Markus Kowalewski21Department of Theoretical Physics, University of Debrecen, H-40410 Debrecen, PO Box 5, Hungary — 2Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden

Coherent control in molecules is usually done with laser fields. The electric field is described classically and control over the time evolution of the system is achieved by shaping the phase and amplitude of laser pulses in the time or frequency domain. Moving on from a classical description to a quantum description of the light field enables us to engineer the quantum state of light and allows to manipulate the light-matter interaction in phase space instead. In this paper we will demonstrate the different principles of control with quantum light on the avoided crossing in lithium fluoride. Using a quantum description of light together with the non-adiabatic couplings and vibronic degrees of freedoms opens up new ways to look at quantum control. We will show the deviations from control with purely classical light field and how back action of the light field becomes important in a few photon regime.

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