Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 34: Quantum Information (Quantum Communication)
Q 34.2: Vortrag
Dienstag, 6. März 2018, 14:15–14:30, K 1.020
Optimal storage of a single photon in a single atom — •Luigi Giannelli1, Tom Schmit1, Stephan Ritter2, Gerhard Rempe2, and Giovanna Morigi1 — 1Theoretische Physik, Universität des Saarlandes, 66123 Saarbrücken, Germany — 2Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany
We theoretically analyze the dynamics of a single photon propagating in free space and incident on the mirror of an optical cavity, in which an atom is trapped. Our purpose is to control the dynamics in order to store the photon in an atomic excitation. The cavity is modeled by a single mode and the relevant electronic states of the atom form a three-level Λ-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). We optimize the temporal behavior of Ω(t) for the purpose of perfect photon storage. We consider several dissipative processes and compare the efficiency of adiabatic protocols, such as in [1-3]. We then develop a protocol in order to optimize the adiabatic transfer in presence of dissipative processes and determine its maximal fidelity. We then investigate the quantum speed limit of photon storage by means of optimal control theory (GRAPE algorithm).
[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).