Speaker:
Sabrina Patsch – FU Berlin

Title:
Control of Rydberg atoms for quantum technologies

Abstract:
Rydberg atoms are the giants in the world of atomic physics. Their highly excited valence electron gives them remarkable properties, such as a long lifetime and extremely large dipole moments rendering them ideal for usage in many-body or composite systems. For instance, Rydberg atoms interact strongly with light, polar objects, or each other. Their great sensitivity to external fields renders them ideal tools for the study of quantum effects and quantum technology applications. We explore different applications of Rydberg atoms for quantum technologies from a quantum control perspective with a special focus on quantum measurements.
To this end, we consider single Rydberg atoms and their interaction with electromagnetic fields, either classical or quantum, and with polar molecules. More precisely, we demonstrate fast and accurate state preparation of Rydberg atoms with shaped radio-frequency pulses derived from optimal control theory [1, 2]. Moreover, we discuss how to use a Rydberg atom inside a cavity as a quantum simulator for open quantum systems [3]. Lastly, we study the multipolar character of Förster resonance energy transfer (FRET) between Rydberg atoms and polar molecules.

[1] S. Patsch, D. M. Reich, J.-M. Raimond, M. Brune, S. Gleyzes, and C. P. Koch, Fast and accurate circularization of a Rydberg atom, Physical Review A 97, 053418 (2018)
[2] A. Larrouy, S. Patsch, R. Richaud, J.-M. Raimond, M. Brune, C. P. Koch, and S. Gleyzes, Fast Navigation in a Large Hilbert Space Using Quantum Optimal Control, Physical Review X 10, 021058 (2020)
[3] S. Patsch, S. Maniscalco, and C. P. Koch, Quantum simulation of non-Markovianity using the quantum Zeno effect, Physical Review Research 2, 023133 (2020)

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QuCoLiMaTalks are the weekly seminar of the collaborative research center TRR 306 QuCoLiMa (Quantum Cooperativity of Light and Matter).
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