Coherent detection of electron dephasing
Mesoscale and Nanoscale Physics
2010-05-24 v1 Quantum Physics
Abstract
We show that an Aharonov-Bohm (AB) ring with asymmetric electron injection can act as a coherent detector of electron dephasing. The presence of a dephasing source in one of the two arms of a moderately-to-highly asymmetric ring changes the response of the system from total reflection to complete transmission while preserving the coherence of the electrons propagating from the ring, even for strong dephasing. We interpret this phenomenon as an implementation of an interaction-free measurement.
Cite
@article{arxiv.0909.2197,
title = {Coherent detection of electron dephasing},
author = {E. Strambini and L. Chirolli and V. Giovannetti and F. Taddei and R. Fazio and V. Piazza and F. Beltram},
journal= {arXiv preprint arXiv:0909.2197},
year = {2010}
}
Comments
4 pages, 3 figures