Fractional photon-assisted tunneling of ultra-cold atoms in periodically shaken double-well lattices

被引：11

作者：

Esmann, M. ^{[1
,2
]}

Pritchard, J. D. ^{[3
]}

Weiss, C. ^{[1
,4
]}

机构：

[1] Carl von Ossietzky Univ Oldenburg, Inst Phys, D-26111 Oldenburg, Germany

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Univ Strathclyde, Dept Phys, Glasgow G4 0NG, Lanark, Scotland

[4] Univ Durham, Dept Phys, Durham DH1 3LE, England

来源：

LASER PHYSICS LETTERS | 2012年 / 9卷 / 02期

关键词：

double-well lattice; photon-assisted tunneling; ultra-cold atoms; BOSE-EINSTEIN CONDENSATE; LOCALIZATION; TRANSPORT; DYNAMICS; GASES;

D O I：

10.1002/lapl.201110109

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Fractional photon-assisted tunneling is investigated both numerically and analytically in a double-well lattice. While integer photon-assisted tunneling is a single-particle effect, fractional photon-assisted tunneling is an interaction-induced many-body effect. Double-well lattices with few particles in each double well are ideal to study this effect far from the mean-field effects. It is predicted that the 1/4-resonance is observable in such systems. Fractional photon-assisted tunneling provides a physically relevant model, for which N-th order time-dependent perturbation theory can be large although all previous orders are small. All predicted effects will be observable with an existing experimental setup [1]. (C) 2012 by Astro Ltd. Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA

引用

页码：160 / 168

页数：9

共 51 条

[1]

Abramowitz M., 1984, Pocketbook of mathematical functions

[2] Generalized acceleration theorem for spatiotemporal Bloch waves [J].

Arlinghaus, Stephan ;

Holthaus, Martin .

PHYSICAL REVIEW B, 2011, 84 (05)

[3] Many-body physics with ultracold gases [J].

Bloch, Immanuel ;

Dalibard, Jean ;

Zwerger, Wilhelm .

REVIEWS OF MODERN PHYSICS, 2008, 80 (03) :885-964

[4] Counting atoms using interaction blockade in an optical superlattice [J].

Cheinet, P. ;

Trotzky, S. ;

Feld, M. ;

Schnorrberger, U. ;

Moreno-Cardoner, M. ;

Foelling, S. ;

Bloch, I. .

PHYSICAL REVIEW LETTERS, 2008, 101 (09)

[5]

Chen Y.-A., 2011, ARXIV11041833V1

[6] Spatially-antisymmetric localization of matter wave in a bichromatic optical lattice [J].

Cheng, Y. ;

Adhikari, S. K. .

LASER PHYSICS LETTERS, 2010, 7 (11) :824-830

[7] Analog of photon-assisted tunneling in a Bose-Einstein condensate [J].

Eckardt, A ;

Jinasundera, T ;

Weiss, C ;

Holthaus, M .

PHYSICAL REVIEW LETTERS, 2005, 95 (20)

[8] Fractional-photon-assisted tunneling in an optical superlattice: Large contribution to particle transfer [J].

Esmann, Martin ;

Teichmann, Niklas ;

Weiss, Christoph .

PHYSICAL REVIEW A, 2011, 83 (06)

[9] Direct observation of second-order atom tunnelling [J].

Foelling, S. ;

Trotzky, S. ;

Cheinet, P. ;

Feld, M. ;

Saers, R. ;

Widera, A. ;

Mueller, T. ;

Bloch, I. .

NATURE, 2007, 448 (7157) :1029-U4

[10]

Folling S., 2010, COMMUNICATION

← 1 2 3 4 5 6 →