Single-Particle Mobility Edge in a One-Dimensional Quasiperiodic Optical Lattice

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Henrik P. Lüschen
  • Sebastian Scherg
  • Thomas Kohlert
  • Michael Schreiber
  • Pranjal Bordia
  • Sankar Das Sarma
  • Immanuel Bloch

Detail(s)

Original languageEnglish
Article number160404
Journal / PublicationPhysical Review Letters
Volume120
Issue number16
Online published19 Apr 2018
Publication statusPublished - 20 Apr 2018
Externally publishedYes

Abstract

A single-particle mobility edge (SPME) marks a critical energy separating extended from localized states in a quantum system. In one-dimensional systems with uncorrelated disorder, a SPME cannot exist, since all single-particle states localize for arbitrarily weak disorder strengths. However, in a quasiperiodic system, the localization transition can occur at a finite detuning strength and SPMEs become possible. In this Letter, we find experimental evidence for the existence of such a SPME in a one-dimensional quasiperiodic optical lattice. Specifically, we find a regime where extended and localized single-particle states coexist, in good agreement with theoretical simulations, which predict a SPME in this regime.

Citation Format(s)

Single-Particle Mobility Edge in a One-Dimensional Quasiperiodic Optical Lattice. / Lüschen, Henrik P.; Scherg, Sebastian; Kohlert, Thomas et al.
In: Physical Review Letters, Vol. 120, No. 16, 160404, 20.04.2018.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review