Dissipative preparation of spin squeezed atomic ensembles in a steady state

Emanuele G. Dalla Torre, Johannes Otterbach, Eugene Demler, Vladan Vuletic, Mikhail D. Lukin

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136 Scopus citations


We present and analyze a new approach for the generation of atomic spin-squeezed states. Our method involves the collective coupling of an atomic ensemble to a decaying mode of an open optical cavity. We demonstrate the existence of a collective atomic dark state, decoupled from the radiation field. By explicitly constructing this state we find that it can feature spin squeezing bounded only by the Heisenberg limit. We show that such dark states can be deterministically prepared via dissipative means, thus turning dissipation into a resource for entanglement. The scaling of the phase sensitivity taking realistic imperfections into account is discussed.

Original languageEnglish
Article number120402
Pages (from-to)120402
JournalPhysical Review Letters
Issue number12
StatePublished - 22 Mar 2013
Externally publishedYes


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