Single Atom Cooling by Superfluid Immersion: A Non-Destructive Method for Qubits

Abstract

We present a scheme to cool the motional state of neutral atoms confined in sites of an optical lattice by immersing the system in a superfluid. The motion of the atoms is damped by the generation of excitations in the superfluid, and under appropriate conditions the internal state of the atom remains unchanged. This scheme can thus be used to cool atoms used to encode a series of entangled qubits non-destructively. Within realisable parameter ranges, the rate of cooling to the ground state is found to be sufficiently large to be useful in experiments.

14 pages, 9 figures, RevTeX 4

References in corpus (6)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Collapse and Revival of the Matter Wave Field of a Bose-Einstein Condensate
• Coherent transport of neutral atoms in spin-dependent optical lattice potentials
• Quantum computing with spatially delocalized qubits
• Collective excitations of a trapped Bose-Einstein condensate in the presence of a 1D optical lattice
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