Pré-Publication, Document De Travail Année : 2025

Coherent Transport in Two-Dimensional Disordered Potentials under Spatially Uniform SU(2) Gauge Fields

Masataka Kakoi
  • Fonction : Auteur
Keith Slevin
  • Fonction : Auteur

Résumé

We study interference effects in the dynamics of a spin $1/2$ particle propagating in two dimensions in a disordered potential and subject to a generalized spin-orbit coupling. With the particle initially in a spin-polarized plane wave state, in the short-time regime, before the spin and momentum distributions reach their steady states, we observe a transient backscattering peak offset from the exact backscattering direction, coexisting with a coherent backscattering dip. We present an intuitive explanation of this momentum offset using a non-Abelian gauge transformation. We also describe the full time evolution of the transient peak, from its buildup to its decay with a precise prediction of the dephasing time within a perturbative framework for multiple scattering. Our results can be applied to general spatially uniform SU(2) gauge fields, including the synthetic gauge field in ultracold atoms.

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Dates et versions

hal-05581533 , version 1 (06-04-2026)

Identifiants

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Masataka Kakoi, Christian Miniatura, Keith Slevin. Coherent Transport in Two-Dimensional Disordered Potentials under Spatially Uniform SU(2) Gauge Fields. 2026. ⟨hal-05581533⟩
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