The Fermi problem in disordered systems
Quantum Physics
2017-11-08 v2 Disordered Systems and Neural Networks
High Energy Physics - Theory
Abstract
We revisit the Fermi two-atoms problem in the framework of disordered systems. In our model we consider a two-qubits system linearly coupled with a quantum massless scalar field. We analyze the energy transfer between the qubits under different experimental perspectives. In addition, we assume that the coefficients of the Klein-Gordon equation are random functions of the spatial coordinates. The disordered medium is modeled by a centered, stationary and Gaussian process. We demonstrate that the classical notion of causality emerges only in the wave zone in the presence of random fluctuations of the light cone. Possible repercussions are discussed.
Cite
@article{arxiv.1702.08310,
title = {The Fermi problem in disordered systems},
author = {G. Menezes and N. F. Svaiter and H. R. de Mello and C. A. D. Zarro},
journal= {arXiv preprint arXiv:1702.08310},
year = {2017}
}
Comments
Revised version; accepted for publication in Physical Review A