Measuring the transmission phase of a quantum dot in a closed interferometer

被引：42
|
作者：
Aharony, A [1 ]
Entin-Wohlman, O
Imry, Y
机构：
[1] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
[2] Weizmann Inst Sci, Albert Einstein Minerva Ctr Theoret Phys, IL-76100 Rehovot, Israel
[3] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.90.156802
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The electron transmission through a closed Aharonov-Bohm mesoscopic solid-state interferometer, with a quantum dot (QD) on one of the paths, is calculated exactly for a simple model. Although the conductance is an even function of the magnetic flux (due to Onsager's relations), in many cases one can use the measured conductance to extract both the amplitude and the phase of the "intrinsic" transmission amplitude t(D) = -i\t(D)\e(D)(ialpha) through the "bare" QD. We also propose to compare this indirect measurement with the (hitherto untested) direct relation sin(2)(alpha(D)) = \t(D)\(2)/max(\t(D)\(2)).
引用
收藏
页码：1 / 156802
页数：4
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