Dephasing and the orthogonality catastrophe in tunneling through a quantum dot: The ''Which Path?'' interferometer

被引：159

作者：

Aleiner, IL ^{[1
]}

Wingreen, NS ^{[1
]}

Meir, Y ^{[1
]}

机构：

[1] BEN GURION UNIV NEGEV, DEPT PHYS, IL-84105 BEER SHEVA, ISRAEL

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.79.3740

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ''Which Path?'' interferometer consists of an Aharonov-Bohm ring with a quantum dot (QD) built in one of its arms, and an additional quantum point contact (QPC) located close to the QD. The transmission coefficient of the QPC depends on the charge state of the QD. Hence the point contact acts as a controllable measurement device for which path an electron takes through the ring. We calculate the suppression of the Aharonov-Bohm oscillations which is caused by both measurement dephasing and the orthogonality catastrophe, i.e., respectively, by real and virtual electron-hole pair creation at the QPC. [S0031-9007(97)04496-7].

引用

页码：3740 / 3743

页数：4

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