Atomic quantum dots coupled to a reservoir of a superfluid Bose-Einstein condensate.
We study the dynamics of an atomic quantum dot, i.e., a single atom in a tight optical trap which is coupled to a superfluid reservoir via laser transitions. Quantum interference between the collisional interactions and the laser induced coupling results in a tunable dot-bath coupling, allowing an essentially complete decoupling from the environment. Quantum dots embedded in a 1D Luttinger liquid of cold bosonic atoms realize a spin-boson model with Ohmic coupling, which exhibits a dissipative phase transition and allows us to directly measure atomic Luttinger parameters.
Recati
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Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.
Fedichev
P O
PO
Zwerger
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W
von Delft
J
J
Zoller
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