Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 3: Quantum Effects: QED I

Q 3.6: Vortrag

Montag, 6. März 2017, 15:45–16:00, P 4

Casimir-Polder Potential for an Atom driven by a Laser Field — •Sebastian Fuchs, Robert Bennett, and Stefan Buhmann — Albert-Ludwigs-Universität Freiburg, Freiburg, Germany

Within the framework of Macroscopic QED we study the interaction between an atom driven by a coherent laser field with a surface and compute the Casimir-Polder potential. We use two different ideas to approach this goal. If the atom is not driven resonantly and remains in its initial state, we can split the dipole moment into a free contribution coming from spontaneous polarization according to Macroscopic QED, and the induced part given by a polarizability and the driving field. The total Casimir-Polder potential also consists of the standard Casimir-Polder part, the induced potential. We contrast this to a resonantly driven atom showing Rabi oscillations between its excited state and the ground state. In a next step we seek to extend this model to a larger number of atoms and investigate the collective behavior using Dicke states.