Regular Article

Driving suppresses decoherence: from a single two-level system to a composite system

Faculty of Science, Kunming University of Science and Technology, Kunming 650093, P.R. China

^a e-mail: lixin_physics@126.com

Received: 15 August 2018
Received in final form: 8 December 2018
Published online: 5 February 2019

Abstract

We show how the driving suppresses the decoherence, triggers the non-Markovian dynamics, and further compresses the quantum speed limit time in the damping channel. For the open composite system consisting of a qubit and a single-mode cavity, we find that solely driving the qubit is most effective against the decoherence, but simultaneously driving the qubit and the cavity with high enough frequency will bring sufficient non-Markovianity, implying a better performance in reducing the quantum speed limit time.