Details

Autor(en) / Beteiligte

• Lüschen, Henrik P
• Scherg, Sebastian
• Kohlert, Thomas
• Schreiber, Michael
• Bordia, Pranjal
• Li, Xiao
• Das Sarma, S
• Bloch, Immanuel

Titel

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

Ist Teil von

• Physical review letters, 2018-04, Vol.120 (16), p.160404-160404, Article 160404

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2018

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• 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.