Improving the coherence time of a quantum system via a coupling with an unstable system
Quantum Physics
2014-04-09 v1 Superconductivity
Abstract
Here, we propose a counter-intuitive use of a hybrid system where the coherence time of a quantum system is actually improved via a coupling with an unstable system. If we couple a two-level system with a single NV center, then a dark state of the NV center naturally forms after the hybridization. We show that this dark state becomes robust against environmental fluctuations due to the coupling even when the coherence time of the two-level system is much shorter than that of the NV center. Our proposal opens a new way to use a quantum hybrid system for the realization of robust quantum information processing
Keywords
Cite
@article{arxiv.1404.1979,
title = {Improving the coherence time of a quantum system via a coupling with an unstable system},
author = {Yuichiro Matsuzaki and Xiaobo Zhu and Kosuke Kakuyanagi and Hiraku Toida and Takaaki Shimo-Oka and Norikazu Mizuochi and Kae Nemoto and Kouichi Semba and William J. Munro and Hiroshi Yamaguchi and Shiro Saito},
journal= {arXiv preprint arXiv:1404.1979},
year = {2014}
}