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Atomic quantum dots coupled to BEC reservoirs

A. Recati·P. O. Fedichev·W. Zwerger·J. von Delft·P. Zoller
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Abstract

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 to the phase fluctuations of the condensate results in a tunable coupling of the dot to a dissipative phonon bath, 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 to directly measure atomic Luttinger parameters.

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A. Recati, P. O. Fedichev, W. Zwerger, J. von Delft, P. Zoller. 2004-04-22. Atomic quantum dots coupled to BEC reservoirs. https://doi.org/10.1103/physrevlett.94.040404

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