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arXiv:cond-mat/9710322 · Physical Review A

Dressed Bose-Einstein condensates in high- Q cavities

Elena V. Goldstein, Ewan M. Wright, Pierre Meystre

Published Feb 1, 1998• 10 citations
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Abstract

We propose and analyze a way in which effective multicomponent condensates can be created inside high-$Q$ multimode cavities. In contrast to the situation involving several atomic species or levels, the coupling between the various components of the dressed condensates is linear. We predict analytically and confirm numerically the onset of instabilities in the quasiparticle excitation spectrum.

DOI
10.1103/physreva.57.1223

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We propose and analyze a way in which effective multicomponent condensates can be created inside high-QQQ multimode cavities. In contrast to the situation involving several atomic species or levels, the coupling between the various components of the dressed condensates is linear. We predict analytically and confirm numerically the onset of instabilities in the quasiparticle excitation spectrum.
We present a novel cavity QED system in which a Bose–Einstein condensate (BEC) is trapped within a high-finesse optical cavity whose length may be adjusted to access both single-mode and multimode configurations. We demonstrate the coupling of an atomic ensemble to the cavity in both configurations and measure that the single-atom, -mode cooperativity exceeds unity. The atoms are confined either within an intracavity far-off-resonance optical dipole trap or a crossed optical dipole trap via transversely oriented lasers. Multimode cavity QED provides fully emergent and dynamical optical lattices for intracavity BECs, in that the process of atomic self-organization may be described as a continuous symmetry breaking phase transition resulting in the emergence of a compliant lattice with phonon-like excitations. Such systems will enable explorations of quantum soft matter, including superfluid smectics, superfluid glasses, and spin glasses as well as neuromorphic associative memory.
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