2014/04/08 by Yuichiro Matsuzaki, Xiaobo Zhu, Matsuzaki, Yuichiro +19
Physics and Astronomy · #FOS: Physical sciences #Quantum Mechanics and Applications #Quantum Physics (quant-ph) #Quantum optics and atomic interactions #Spectroscopy and Quantum Chemical Studies #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.48550/arxiv.1404.1979
arxiv created 2014/04/08 · openalex publication_date 2014/04/08 · arxiv updated 2014/04/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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