Electronic implementations of Interaction-Free Measurements
Abstract
Three different implementations of interaction-free measurements (IFMs) in solid-state nanodevices are discussed. The first one is based on a series of concatenated Mach-Zehnder interferometers, in analogy to optical-IFM setups. The second one consists of a single interferometer and concatenation is achieved in the time domain making use of a quantized electron emitter. The third implementation consists of an asymmetric Aharonov-Bohm ring. For all three cases we show that the presence of a dephasing source acting on one arm of the interferometer can be detected without degrading the coherence of the measured current. Electronic implementations of IFMs in nanoelectronics may play a fundamental role as very accurate and noninvasive measuring schemes for quantum devices.
Keywords
Cite
@article{arxiv.1004.1895,
title = {Electronic implementations of Interaction-Free Measurements},
author = {L. Chirolli and E. Strambini and V. Giovannetti and F. Taddei and V. Piazza and R. Fazio and F. Beltram and G. Burkard},
journal= {arXiv preprint arXiv:1004.1895},
year = {2015}
}
Comments
12 pages, 10 figures