Trapping and observing single atoms in the dark

Details Trapping and observing single atoms in the dark Trapping and observing single atoms in the dark

2007-02-15

arxiv.org/abs/quant-ph/0702162v2

Phys. Rev. Lett. 99, 013002 (2007)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.99.013002

A single atom strongly coupled to a cavity mode is stored by three-dimensional confinement in blue-detuned cavity modes of different longitudinal and transverse order. The vanishing light intensity at the trap center reduces the light shift of all atomic energy levels. This is exploited to detect a single atom by means of a dispersive measurement with 95% confidence in 0.010 ms, limited by the photon-detection efficiency. As the atom switches resonant cavity transmission into cavity reflection, the atom can be detected while scattering about one photon.

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