Charge sensing amplification via weak values measurement

Details Charge sensing amplification via weak values measurement Charge sensing amplification via weak values measurement

2010-09-23

arxiv.org/abs/1009.4738v2

Phys.Rev.Lett.106:080405,2011

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.106.080405

A protocol employing weak values (WVs) to obtain ultra sensitive amplification of weak signals in the context of a solid state setup is proposed. We consider an Aharonov-Bohm interferometer where both the orbital and the spin degrees of freedom are weakly affected by the presence of an external charge to be detected. The interplay between the spin and the orbital WVs leads to a significant amplification even in the presence of finite temperature, voltage, and external noise.

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