Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 9: Quantum Communication II
Q 9.2: Vortrag
Montag, 6. März 2017, 17:15–17:30, P 3
Controlled absorption of a single photon — •Luigi Giannelli1, Tom Schmit1, Susanne Blum1,4, Daniel M. Reich2,3, Christiane P. Koch2, Tommaso Calarco5, and Giovanna Morigi1 — 1Universität des Saarlandes, 66123 Saarbrücken, Germany — 2Universität Kassel, 34132 Kassel, Germany — 3Aarhus University, 8000 Aarhus C, Denmark — 4Theodor-Heuss-Gymnasium, 73730 Esslingen am Neckar, Germany — 5Universität Ulm, 89069 Ulm, Germany
We numerically analyse the dynamics of a single photon propagating in free space and incident on the mirror of an optical cavity, in which an atom is localized. Our purpose is to identify the parameter regimes and dynamics which allow for perfect absorption of the photon by the atom. The cavity is modeled by a single mode, while the relevant electronic states of the atom form a three-level Lambda system: one transition is coupled to the quantized field of the cavity via Jaynes-Cummings interaction, while the other transition is driven by a classical control field Ω(t), whose temporal behaviour is optimized for the purpose of controlling absorption. We consider dissipative processes and compare the efficiency of adiabatic protocols, such as in [1-3], with the ones which employ optimal control in order to speed up the process. We also discuss the quantum speed limit of this process.
[1] M. Fleischhauer, et al., Opt. Commun. 179, 395 (2000).
[2] A. V. Gorshkov, et al., Phys. Rev. A 76, 033804 (2007).
[3] J. Dilley, et al., Phys. Rev. A 85, 023834 (2012).