Dephasing and the Orthogonality Catastrophe in Tunneling through a Quantum Dot: the ``Which Path?'' Interferometer
Mesoscale and Nanoscale Physics
2016-08-31 v1
Abstract
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 causes controllable dephasing of transport through the QD, and acts as a measurement device for which path an electron takes through the ring. We calculate the suppression of the Aharonov-Bohm oscillations which is caused both by dephasing and by the orthogonality catastrophe, i.e., respectively, by real and virtual electron-hole pair creation at the QPC.
Cite
@article{arxiv.cond-mat/9702001,
title = {Dephasing and the Orthogonality Catastrophe in Tunneling through a Quantum Dot: the ``Which Path?'' Interferometer},
author = {I. L. Aleiner and Ned S. Wingreen and Yigal Meir},
journal= {arXiv preprint arXiv:cond-mat/9702001},
year = {2016}
}
Comments
5 pages, 1 .ps figure included