Identification of quantum vortices in momentum space
Nikolay V. Larionov, Vasily M. Molchanovskiy
TL;DR
This paper theoretically investigates quantum vortices in the momentum space of a hydrogen atom ionized by an ultrashort laser pulse, using wave function analysis to identify vortices via flux density.
Contribution
It introduces a novel method to identify quantum vortices in momentum space by analyzing phase-sensitive probability flux density.
Findings
Quantum vortices are identified in the momentum space of ionized hydrogen atoms.
The phase-sensitive flux density provides a new way to detect vortices.
Analytical wave function expressions enable detailed vortex analysis.
Abstract
The quantum vortices formed as a result of barrier-suppression ionization of a two-dimensional hydrogen atom by an ultrashort laser pulse are theoretically investigated. Using an analytical expression for the wave function of a photoelectron in the momentum representation, the probability flux density is investigated. In this case, both the standard definition of a flux and an alternative one are used. The latter, due to the sensitivity to the phase of the wave function, makes it possible to identify quantum vortices in the momentum space.
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Taxonomy
TopicsLaser-Matter Interactions and Applications · Laser-Plasma Interactions and Diagnostics · Laser Design and Applications