A single atom in free space as a quantum aperture
S. J. van Enk, H. J. Kimble
Abstract
We calculate exact 3-D solutions of Maxwell equations corresponding to strongly focused light beams, and study their interaction with a single atom in free space. We show how the naive picture of the atom as an absorber with a size given by its radiative cross section σ=3λ2/2π must be modified. The implications of these results for quantum information processing capabilities of trapped atoms are discussed.
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