Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 2: Quanteninformation (Photonen und nichtklassisches Licht I)
Q 2.3: Vortrag
Montag, 19. März 2007, 11:00–11:15, 5L
Continuous-variable photonic interfaces using single atoms — •Giovanna Morigi1, David Vitali2, Priscilla Canizares1,2, Stefano Mancini2, and Jürgen Eschner3 — 1Dept. de Fisica, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Spain — 2Dipt. di Fisica, Universitá di Camerino, I-62032 Camerino, Italy — 3ICFO-The Institute of Photonic Sciences, E-08860 Castelldefels (Barcelona), Spain
Single atoms or ions are promising candidates for atom-photon interfaces due to the high degree of control one can achieve on these systems. Control can be gained both on the internal (electronic) as well as on the external (motional) degrees of freedom, which can both be interfaced with light by exchange of angular and linear momentum. We present our recent proposal of realizing an optical parametric amplifier based on a single cold trapped atom inside a high-finesse optical cavity, and we show that this system allows for the controlled, quantum-coherent generation of entangled light by exploiting the mechanical effects of atom-photon interaction [1,2]. Using a similar mechanism, the system also allows for the controlled creation, storage and release of pairs of entangled light pulses mediated by the single atom [1,3]. The efficiency of these schemes is investigated for parameter regimes of current experiments with cold atoms and cavities.
[1] G. Morigi, J. Eschner, S. Mancini, and D. Vitali, Phys. Rev. Lett. 96, 023601 (2006); Phys. Rev. A 73, 033822 (2006).
[2] D. Vitali, G. Morigi, J. Eschner, Phys. Rev. A 74, 053814 (2006).
[3] P. Canizares, D. Vitali, J. Eschner, and G. Morigi, in preparation.