Momentum-space signatures of the Anderson transition in a symplectic, two-dimensional, disordered ultracold gas
Year: 2024
Type: article
Abstract: We study Anderson localization in two-dimensional, disordered, spin-orbit systems belonging to the symplectic symmetry class using momentum-space signatures such as the coherent backscattering antipeak and the coherent forward-scattering peak. Significantly, these momentum-space features are readily accessible in ultracold atom experiments through absorption imaging after time-of-flight expansion. Here, the critical exponent and mobility edge of the metal-insulator transition are successfully obtained through a finite-time analysis of the coherent backscattering width. An anomalous residual diffusion, unique to two dimensions, is identified at the transition point where the system changes from a metal to an insulator. A spin localization phenomenon is also observed in the deep localized regime. Published by the American Physical Society 2024
Source: Physical Review Research
Institutions: The Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago, Centre for Quantum Technologies, Centre National de la Recherche Scientifique, Université de Toulon, National University of Singapore, Aix-Marseille Université, UMI MajuLab, Nanyang Technological University, Université Côte d'Azur, Institut de Physique de Nice
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
OpenAlex ID: W4317548393