Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 39: Posters: Quantum Optics and Photonics III

Q 39.55: Poster

Wednesday, March 11, 2020, 16:30–18:30, Empore Lichthof

Quantum Memories based on Adiabatic Transfer and Beyond — •Tom Schmit, Luigi Giannelli, and Giovanna Morigi — Theoretische Physik, Universität des Saarlandes, 66123 Saarbrücken, Germany

Quantum memories are the storage units of a quantum network [1]. The transfer of the qubit state to the memory can be accomplished by different types of protocols. Typically, protocols based on adiabatic dynamics are preferrable due to their robustness against moderate fluctuations of experimental parameters, on the other hand they require long-transfer times. In this work we analyse theoretically the efficiency of adiabatic storage of single photons [2] in quantum memories based on (i) a single atom inside an optical resonator and (ii) a solid-state medium. We discuss the efficiency of protocols based on adiabatic dynamics [3,4] when applied in the non-adiabatic regime. We finally extend these protocols by including pulses determined via optimal control theory and analyse their efficiency.
[1] H. J. Kimble, Nature 453, 1023 (2008).
[2] N. Sangouard and H. Zbinden, Jour. of Mod. Opt., 59:17, 1458-1464 (2012).
[3] M. Fleischhauer, and M. D. Lukin, Phys. Rev. A, 65, 022314 (2002).
[4] A. V. Gorshkov, A. André, M. D. Lukin, and A. S. Sørensen, Phys. Rev. A, 76, 033804 (2007).