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arXiv · 1705.11157

Macroscopic random Paschen-Back effect in ultracold atomic gases

M. Modugno·E. Ya. Sherman·V. V. Konotop
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Abstract

We consider spin- and density-related properties of single-particle states in a one-dimensional system with random spin-orbit coupling. We show that the presence of an additional Zeeman field $Δ$ induces both nonlinear spin polarization and delocalization of states localized at $Δ=0$, corresponding to a random macroscopic analogue of the Paschen-Back effect. While the conventional Paschen-Back effect corresponds to a saturated $Δ-$dependence of the spin polarization, here the gradual suppression of the spin-orbit coupling effects by the Zeeman field is responsible both for the spin saturation and delocalization of the particles.

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M. Modugno, E. Ya. Sherman, V. V. Konotop. 2017-05-31. Macroscopic random Paschen-Back effect in ultracold atomic gases. https://doi.org/10.1103/physreva.95.063620

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