Electric Quantum Walks with Individual Atoms

被引：140

作者：

Genske, Maximilian ^{[1
]}

Alt, Wolfgang ^{[1
]}

Steffen, Andreas ^{[1
]}

Werner, Albert H. ^{[2
]}

Werner, Reinhard F. ^{[2
]}

Meschede, Dieter ^{[1
]}

Alberti, Andrea ^{[1
]}

机构：

[1] Univ Bonn, Inst Angew Phys, D-53115 Bonn, Germany

[2] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 19期

关键词：

OPTICAL BLOCH OSCILLATIONS; SEMICONDUCTOR SUPERLATTICE; SPACE; TIME;

D O I：

10.1103/PhysRevLett.110.190601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the experimental realization of electric quantum walks, which mimic the effect of an electric field on a charged particle in a lattice. Starting from a textbook implementation of discrete-time quantum walks, we introduce an extra operation in each step to implement the effect of the field. The recorded dynamics of such a quantum particle exhibits features closely related to Bloch oscillations and interband tunneling. In particular, we explore the regime of strong fields, demonstrating contrasting quantum behaviors: quantum resonances versus dynamical localization depending on whether the accumulated Bloch phase is a rational or irrational fraction of 2 pi.

引用

页数：5

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