Measurement of the mobility edge for 3D Anderson localization

被引：183

作者：

Semeghini, G. ^{[1
,2
]}

Landini, M. ^{[1
,2
,3
]}

Castilho, P. ^{[1
,2
]}

Roy, S. ^{[1
,2
]}

Spagnolli, G. ^{[1
,2
,3
]}

Trenkwalder, A. ^{[1
,2
,3
]}

Fattori, M. ^{[1
,2
,3
]}

Inguscio, M. ^{[1
,2
,4
]}

Modugno, G. ^{[1
,2
,3
]}

机构：

[1] Univ Firenze, LENS, I-50019 Sesto Fiorentino, Italy

[2] Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy

[3] CNR, INO, I-50019 Sesto Fiorentino, Italy

[4] INRIM, I-10135 Turin, Italy

来源：

NATURE PHYSICS | 2015年 / 11卷 / 07期

基金：

欧盟地平线“2020”; 欧洲研究理事会;

关键词：

METAL-INSULATOR-TRANSITION; DIFFUSION; ATOMS;

D O I：

10.1038/NPHYS3339

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Anderson localization is a universal phenomenon affecting non-interacting quantum particles in a disordered environment. In three spatial dimensions, theory predicts a quantum phase transition from localization to diffusion at a critical energy, the mobility edge, which depends on the disorder strength. Although it has been recognized already long ago as a prominent feature of disordered systems, a complete experimental characterization of the mobility edge is still missing. Here we report the measurement of the mobility edge for ultracold atoms in a disordered potential created by laser speckles. We are able to control both the disorder strength and the energy of the system, so as to probe the position of the localization threshold in the disorder-energy plane. Our results might allow a direct experiment-theory comparison, which is a prerequisite to study the even more challenging problem of disorder and interactions.

引用

页码：554 / 559

页数：6

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