The protection of the coherence of open quantum systems against the influence of their environment is a very topical issue. A scheme is proposed here which protects a general quantum system from the action of a set of arbitrary uncontrolled unitary evolutions. This method draws its inspiration from ideas of standard error-correction (ancilla adding, coding and decoding) and the Quantum Zeno Effect. A pedagogical demonstration of our method on a simple atomic system, namely a Rubidium isotope, is proposed.
@article{arxiv.quant-ph/0403227,
title = {Coherence protection by the quantum Zeno effect and non-holonomic control in a Rydberg Rubidium isotope},
author = {E. Brion and V. M. Akulin and D. Comparat and I. Dumer and G. Harel and N. Kebaili and G. Kurizki and I. Mazets and P. Pillet},
journal= {arXiv preprint arXiv:quant-ph/0403227},
year = {2016}
}