Observation of many-body localization of interacting fermions in a quasirandom optical lattice

被引：1368

作者：

Schreiber, Michael ^{[1
,2
]}

Hodgman, Sean S. ^{[1
,2
]}

Bordia, Pranjal ^{[1
,2
]}

Lueschen, Henrik P. ^{[1
,2
]}

Fischer, Mark H. ^{[3
]}

Vosk, Ronen ^{[3
]}

Altman, Ehud ^{[3
]}

Schneider, Ulrich ^{[1
,2
,4
]}

Bloch, Immanuel ^{[1
,2
]}

机构：

[1] Univ Munich, Fak Phys, D-80799 Munich, Germany

[2] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

[3] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-7610001 Rehovot, Israel

[4] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

SCIENCE | 2015年 / 349卷 / 6250期

关键词：

ANDERSON LOCALIZATION; ULTRACOLD ATOMS; SYSTEM; GAS; THERMALIZATION; EQUILIBRIUM; RELAXATION; TRANSPORT; INSULATOR; MATTER;

D O I：

10.1126/science.aaa7432

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Many-body localization (MBL), the disorder-induced localization of interacting particles, signals a breakdown of conventional thermodynamics because MBL systems do not thermalize and show nonergodic time evolution. We experimentally observed this nonergodic evolution for interacting fermions in a one-dimensional quasirandom optical lattice and identified the MBL transition through the relaxation dynamics of an initially prepared charge density wave. For sufficiently weak disorder, the time evolution appears ergodic and thermalizing, erasing all initial ordering, whereas above a critical disorder strength, a substantial portion of the initial ordering persists. The critical disorder value shows a distinctive dependence on the interaction strength, which is in agreement with numerical simulations. Our experiment paves the way to further detailed studies of MBL, such as in noncorrelated disorder or higher dimensions.

引用

页码：842 / 845

页数：4

共 51 条

[1] ABSENCE OF DIFFUSION IN CERTAIN RANDOM LATTICES [J].

ANDERSON, PW .

PHYSICAL REVIEW, 1958, 109 (05) :1492-1505

[2] Purification and Many-Body Localization in Cold Atomic Gases [J].

Andraschko, Felix ;

Enss, Tilman ;

Sirker, Jesko .

PHYSICAL REVIEW LETTERS, 2014, 113 (21)

[3]

[Anonymous], 2005, The One-Dimensional Hubbard Model

[4]

Aubry S., 1980, Annals of the Israel Physical Society, V3, P133

[5] A quantum gas microscope for detecting single atoms in a Hubbard-regime optical lattice [J].

Bakr, Waseem S. ;

Gillen, Jonathon I. ;

Peng, Amy ;

Foelling, Simon ;

Greiner, Markus .

NATURE, 2009, 462 (7269) :74-U80

[6] Absence of Diffusion in an Interacting System of Spinless Fermions on a One-Dimensional Disordered Lattice [J].

Bar Lev, Yevgeny ;

Cohen, Guy ;

Reichman, David R. .

PHYSICAL REVIEW LETTERS, 2015, 114 (10)

[7] Unbounded Growth of Entanglement in Models of Many-Body Localization [J].

Bardarson, Jens H. ;

Pollmann, Frank ;

Moore, Joel E. .

PHYSICAL REVIEW LETTERS, 2012, 109 (01)

[8] Metal-insulator transition in a weakly interacting many-electron system with localized single-particle states [J].

Basko, DM ;

Aleiner, IL ;

Altshuler, BL .

ANNALS OF PHYSICS, 2006, 321 (05) :1126-1205

[9]

Bauer B., 2013, J STAT MECH-THEORY E, V09

[10] Direct observation of Anderson localization of matter waves in a controlled disorder [J].

Billy, Juliette ;

Josse, Vincent ;

Zuo, Zhanchun ;

Bernard, Alain ;

Hambrecht, Ben ;

Lugan, Pierre ;

Clement, David ;

Sanchez-Palencia, Laurent ;

Bouyer, Philippe ;

Aspect, Alain .

NATURE, 2008, 453 (7197) :891-894

← 1 2 3 4 5 6 →