Transverse Momentum Transfer in Atom-Light Scattering

We predict a photon Hall effect in the optical cross-section of atomic hydrogen, which is caused by the interference between an electric quadrupole transition and an electric dipole transition from the ground state to $3D_{3/2}$ and $3P_{3/2}$. This induces a magneto-transverse acceleration comparable to a fraction of $g$. In atoms with a two level electric dipole transition, a much smaller transverse force is generated only when the atom is moving.

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