A single atom in free space as a quantum aperture

Details A single atom in free space as a quantum aperture A single atom in free space as a quantum aperture

1999-08-27

arxiv.org/abs/quant-ph/9908082v1

Physics

Quantum Physics

4 pages ReVTeX and 3 eps figures

Scientific paper

10.1103/PhysRevA.61.051802

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 $\sigma =3\lambda ^{2}/2\pi $ must be modified. The implications of these results for quantum information processing capabilities of trapped atoms are discussed.

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