Detector-tuned overlap catastrophe in quantum dots
Mesoscale and Nanoscale Physics
2024-08-27 v3
Abstract
The Anderson overlap catastrophe (AOC) is a many-body effect arising as a result of a shakeup of a Fermi sea due to an abrupt change of a local potential, leading to a power-law dependence of the density of states on energy. Here we demonstrate that a standard quantum-dot detector can be employed as a highly tuneable probe of the AOC, where the power law can be continuously modified by a gate voltage. We show that signatures of the AOC have already appeared in previous experiments, and give explicit predictions allowing to tune and pinpoint their non-perturbative aspects.
Cite
@article{arxiv.2402.04207,
title = {Detector-tuned overlap catastrophe in quantum dots},
author = {Sarath Sankar and Corentin Bertrand and Antoine Georges and Eran Sela and Yigal Meir},
journal= {arXiv preprint arXiv:2402.04207},
year = {2024}
}