Bessel beams of two-level atoms driven by a linearly polarized laser field

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We study Bessel beams of two-level atoms that are driven by a linearly polarized laser field. Starting from the Schrödinger equation, we determine the states of two-level atoms in a plane-wave field respecting propagation directions both of the atom and the field. For such laser-driven two-level atoms, we construct Bessel beams beyond the typical paraxial approximation. We show that the probability density of these atomic beams obtains a non-trivial, Bessel-squared-type behavior and can be tuned under the special choice of the atom and laser parameters, such as the nuclear charge, atom velocity, laser frequency, and propagation geometry of the atom and laser beams. Moreover, we spatially and temporally characterize the beam of hydrogen and selected (neutral) alkali-metal atoms that carry non-zero orbital angular momentum (OAM). The proposed spatiotemporal Bessel states (i) are able to describe, in principle, twisted states of any two-level system which is driven by the radiation field and (ii) have potential applications in atomic and nuclear processes as well as in quantum communication. © 2013 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.

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Hayrapetyan, A. G., Matula, O., Surzhykov, A., & Fritzsche, S. (2013). Bessel beams of two-level atoms driven by a linearly polarized laser field. European Physical Journal D, 67(8).

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