Double Landau-Zener interferometry in a dc-ac-driven Bloch-Zener oscillation

被引：6
作者：
Mizumoto, Y. [1 ,2 ]
Kayanuma, Y. [1 ,2 ,3 ]
机构：
[1] Osaka Prefecture Univ, Res Org 21st Century, Sakai, Osaka 5998531, Japan
[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 332001, Japan
[3] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 227, Japan
来源：
PHYSICAL REVIEW A | 2013年 / 88卷 / 02期
关键词：
ATOMS;
D O I：
10.1103/PhysRevA.88.023611
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The effect of an additional high frequency alternating field on the Bloch-Zener oscillation of a quantum particle is investigated theoretically. The effective magnitude of the band gap is reduced by the ac field, and even collapsed to zero by appropriately tuning the amplitude and the frequency of the oscillation. This results in the enhancement of the Zener tunneling with dramatic changes of the Bloch-Zener oscillation. The temporal behavior of the wave packet is clarified as due to the interplay of the Landau-Zener interference in the repeated level crossings with two different time scales, namely, the period of the Bloch oscillation, and the period of the high frequency ac field.
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页数：6
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