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Journal Article

Optimization of selective two-photon absorption in cavity polaritons


Schlawin,  F.
Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Centre for Ultrafast Imaging;
Clarendon Laboratory, University of Oxford;

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Carnio, E. G., Buchleitner, A., & Schlawin, F. (2021). Optimization of selective two-photon absorption in cavity polaritons. The Journal of Chemical Physics, 154(21): 214114. doi:10.1063/5.0049863.

Cite as: https://hdl.handle.net/21.11116/0000-0008-DFBF-7
We investigate optimal states of photon pairs to excite a target transition in a multilevel quantum system. With the help of coherent control theory for two-photon absorption with quantum light, 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 to overcome this problem and enhance the achievable “selectivity” between two energy levels, i.e., the relative difference in population transferred into each of them. We find that the added value of optimal entangled states of light increases with broadening linewidths of the target states.