Back-action effects in charge detection
Mesoscale and Nanoscale Physics
2025-03-06 v1 Strongly Correlated Electrons
Abstract
Charge detection offers a powerful probe of mesoscopic structures based on quantum dots, but it also invariably results in measurement back-action (MBA). If strong, MBA can be detrimental to the physical properties being probed. In this work, we focus on the effects of MBA on an Anderson impurity model in which the impurity is coupled electrostatically to a detector. Introducing a novel non-perturbative method, we explore the interplay of coherent dynamics, strong correlations and non-equilibrium conditions. The effects of MBA can be seen most clearly in the temperature derivative of occupation. In the non-equilibrium case, we identify this as arising due to an energy flow from the detector to the impurity.
Cite
@article{arxiv.2503.03416,
title = {Back-action effects in charge detection},
author = {Sarath Sankar and Matan Lotem and Joshua Folk and Eran Sela and Yigal Meir},
journal= {arXiv preprint arXiv:2503.03416},
year = {2025}
}