Energy distribution and cooling of a single atom in an optical tweezer

Details Energy distribution and cooling of a single atom in an optical tweezer Energy distribution and cooling of a single atom in an optical tweezer

2008-05-22

arxiv.org/abs/0805.3510v2

Phys. Rev. A 78, 033425 (2008)

Physics

Quantum Physics

9 pages, 6 figures, published in PRA

Scientific paper

10.1103/PhysRevA.78.033425

We investigate experimentally the energy distribution of a single rubidium atom trapped in a strongly focused dipole trap under various cooling regimes. Using two different methods to measure the mean energy of the atom, we show that the energy distribution of the radiatively cooled atom is close to thermal. We then demonstrate how to reduce the energy of the single atom, first by adiabatic cooling, and then by truncating the Boltzmann distribution of the single atom. This provides a non-deterministic way to prepare atoms at low microKelvin temperatures, close to the ground state of the trapping potential.

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