Dephasing due to which path detector

被引：6

作者：

Buks, E ^{[1
]}

Schuster, R ^{[1
]}

Heiblum, M ^{[1
]}

Mahalu, D ^{[1
]}

Umansky, V ^{[1
]}

机构：

[1] Weizmann Inst Sci, Braun Ctr Submicron Res, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

来源：

PHYSICA B-CONDENSED MATTER | 1998年 / 249卷

关键词：

dephasing; quantum dots; Aharonov-Bohm effect;

D O I：

10.1016/S0921-4526(98)00118-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study dephasing of electrons induced by a which path detector and thus verify Bohr's complementarity principle for fermions. We utilize a double path interferometer with two slits, with one slit being replaced by a coherent quantum dot (QD). A short one dimensional channel, in the form of a quantum point contact (QPC), in close proximity to the QD, serves as a which path detector. We find that by varying the properties of the QPC detector we affect the visibility of the interference, inducing thus dephasing. We develop a simple model to explain the dephasing due to the detector and find good agreement with the experiment. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：295 / 301

页数：7

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