Keywords
momentum representation
photoelectron
probability flux
quantum vortex
Abstract
Quantum vortices formed by a photoelectron obtained as a result of over-barrier ionization of a two-dimensional hydrogen atom by an extremely short laser pulse are theoretically investigated. The sensitivity of quantum vortices to the initial phase of the ionizing field is analyzed. The interference effects responsible for the appearance of vortices are being clarified. For the model under consideration, the use of various gauges in describing the interaction of an electron with a field is discussed.
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