Quantum dynamics of a small symmetry breaking measurement device
Quantum Physics
2018-08-07 v1
Abstract
A quantum measuring instrument is constructed that utilises symmetry breaking to enhance a microscopic signal. The entire quantum system consists of a system-apparatus-environment triad that is composed of a small set of spin-1/2 particles. The apparatus is a ferromagnet that measures the -component of a single spin. A full quantum many-body calculation allows for a careful examination of the loss of phase coherence, the formation and amplification of system-apparatus correlations, the irreversibility of registration, the fault tolerance, and the bias of the device.
Keywords
Cite
@article{arxiv.1804.08151,
title = {Quantum dynamics of a small symmetry breaking measurement device},
author = {H. C. Donker and H. De Raedt and M. I. Katsnelson},
journal= {arXiv preprint arXiv:1804.08151},
year = {2018}
}