Dark state with counter-rotating dissipative channels
Abstract
Dark state as a consequence of interference between different quantum states has great importance in the fields of chip-scale atomic clock and quantum information. For the -type three-level system, this dark state is generally regarded as being dissipation-free because it is a superposition of two lowest states without dipole transition between them. However, previous studies are based on the rotating-wave approximation (RWA) by neglecting the counter-rotating terms in the system-environment interaction. In this work, we study non-Markovian quantum dynamics of the dark state in a -type three-level system coupled to two bosonic baths and reveal the effect of counter-rotating terms on the dark state. In contrast to the dark state within the RWA, leakage of the dark state occurs even at zero temperature, as a result of these counter-rotating terms. Also, we present a method to restore the quantum coherence of the dark state by applying a leakage elimination operator to the system.
Keywords
Cite
@article{arxiv.1703.10775,
title = {Dark state with counter-rotating dissipative channels},
author = {Zheng-yang Zhou and Mi Chen and Lian-Ao Wu and Ting Yu and J. Q. You},
journal= {arXiv preprint arXiv:1703.10775},
year = {2017}
}