Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 34: Poster 1

Q 34.42: Poster

Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II

Cavity cooling of an atomic array — •Oxana Mishina and Giovanna Morigi — Theoretische Physik, Universität des Saarlandes, D-66041 Saarbrücken, Germany

In this work we discuss a ground state cooling of the motion of a large number of atoms as an important step on the way to control a many body system. The atoms form an array along the axis of a standing-wave optical resonators, and are confined by an optical lattice, due to an external classical field, whose periodicity may not be commensurate with the one of the cavity mode. The atoms are localized at the minima of the potential wells, and hopping and tunneling effects are neglected. In our model the cavity is pumped and the setup is similar to the one realised experimentally in [1]. Assuming the Lamb-Dicke regime, a set of equations is derived that describe the cooling dynamics of the atomic array. In particular, we identify the conditions under which only few collective modes of atomic motion are cooled, while the others are decoupled from radiation. Such a many body system with different interaction regimes can be a suitable resource for quantum technologies like quantum communications and computing.

[1] Optomechanical Cavity Cooling of an Atomic Ensemble M.H. Schleier-Smith, I.D. Leroux, H. Zhang, M.A. Van Camp, and V. Vuletić Phys. Rev. Lett. 107, 143005 (2011)

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