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A: Fachverband Atomphysik
A 16: Molecules in Intense Fields and Quantum Control (joint session MO/A)
A 16.6: Talk
Wednesday, March 8, 2023, 16:00–16:15, F102
Optimization of selective two-photon absorption in cavity polaritons — •Edoardo Carnio1,2, Andreas Buchleitner1,2, and Frank Schlawin3,4,5 — 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, D-79104, Freiburg, Germany — 2EUCOR Centre for Quantum Science and Quantum Computing, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, D-79104, Freiburg, Germany — 3Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, D-22761 Hamburg, Germany — 4The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany — 5Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
We investigate optimal states of photon pairs to excite a target transition in a multilevel quantum system. From the optimal control theory of entangled two-photon absorption we infer the maximal population achievable by optimal entangled vs. separable states of light. Interference between excitation pathways, as well as the presence of nearby states, may hamper the selective excitation of a particular target state, but we show that quantum correlations can help overcome this problem, and enhance the achievable “selectivity” between two target energy levels, i.e. the relative difference in population transferred into each of them.
[1] E. G. Carnio, A. Buchleitner, F. Schlawin, J. Chem. Phys. 154, 214114 (2021).