Dark-state cooling of atoms by superfluid immersion

A. Griessner*, A. J. Daley, S. R. Clark, D. Jaksch, P. Zoller

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

65 Citations (Scopus)


We propose and analyze a scheme to cool atoms in an optical lattice to ultralow temperatures within a Bloch band and away from commensurate filling. The protocol is inspired by ideas from dark-state laser cooling but replaces electronic states with motional levels and spontaneous emission of photons by emission of phonons into a Bose-Einstein condensate, in which the lattice is immersed. In our model, achievable temperatures correspond to a small fraction of the Bloch bandwidth and are much lower than the reservoir temperature. This is also a novel realization of an open quantum optical system, where known tools are combined with new ideas involving cooling via a reservoir.

Original languageEnglish
Article number220403
JournalPhysical Review Letters
Issue number22
Publication statusPublished - 1 Jan 2006

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