Andrei Afanasev, Carl E. Carlson, Asmita Mukherjee
We show that the twisted photon states, or photon states with large ($> \hbar$) angular momentum projection in the direction of motion, can photoexcite atomic levels having a distribution of quantum numbers in the final state, which are novel and distinct from the excited states produced by plane-wave photons. We considered a general case when the symmetry axis of the twisted-photon beam does not coincide with the center of the atomic target. Numerical calculations are presented using a hydrogen atom as an example. Interesting implications and observables for the above process are pointed out.
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http://arxiv.org/abs/1305.3650
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