Measurement of spectral functions of ultracold atoms in disordered potentials

Abstract

We report on the measurement of the spectral functions of noninteracting ultracold atoms in a three-dimensional disordered potential resulting from an optical speckle field. Varying the disorder strength by 2 orders of magnitude, we observe the crossover from the "quantum" perturbative regime of low disorder to the "classical" regime at higher disorder strength, and find an excellent agreement with numerical simulations. The method relies on the use of state-dependent disorder and the controlled transfer of atoms to create well-defined energy states. This opens new avenues for experimental investigations of three-dimensional Anderson localization.

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• Spectral Functions of One-Dimensional Systems with Correlated Disorder
• Exact Dynamical Correlations of Hard-Core Anyons in One-Dimensional Lattices
• Plasmono-Atomic Interactions on a Fiber Tip
• Observing the loss and revival of long-range phase coherence through disorder quenches
• Spectral functions and localization landscape theory in speckle potentials
• Dressed dense atomic gases
• Exact spectral function of the Tonks-Girardeau gas at finite temperature
• Band manipulation and spin texture in interacting moiré helical edges
• Coherent Forward Scattering Peak and Multifractality
• Local Density of the Bose Glass Phase
• Impurity coupled to a lattice with disorder
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• Localization landscape for interacting Bose gases in one-dimensional speckle potentials
• Observation of the algebraic localization-delocalization transition in a 1D disordered potential with a bias force
• One-Dimensional Disordered Bosonic Systems
• Ultracold Atoms in Disordered Potentials: Elastic Scattering Time in the Strong Scattering Regime
• Emergence of damped-localized excitations of the Mott state due to disorder
• From percolation transition to Anderson localization in one-dimensional speckle potentials
• Phase Diagram and Spectral Function of the Two-Dimensional Disordered Bose-Hubbard Model: A Real-Space Dynamical Mean-Field Theory Analysis
• Local density of states and scattering rates across the many-body localization transition
• Bichromatic state-dependent disordered potential for Anderson localization of ultracold atoms