https://doi.org/10.1140/epjp/s13360-021-01306-1
Regular Article
Enhancement of asymmetric steering via interference effects induced by twofold modulations in a cavity optomechanical system
1
Department of Electronic Engineering, Zhangzhou Institute of Technology, 363000, Zhangzhou, China
2
School of Information and Electronic Engineering (Sussex Artificial Intelligence Institute), Zhejiang Gongshang University, 310018, Hangzhou, China
Received:
10
October
2020
Accepted:
10
March
2021
Published online:
19
March
2021
In a general two-mode cavity optomechanical system driven with a mildly amplitude modulated light field, we investigate in detail the properties of entanglement and asymmetric steering between the cavity field and the mechanical oscillator, whose frequency is also applied by a sinusoidal modulation. Twofold modulations of the system inducing interference effects determined by the relative phase between the two modulations. By calculating the logarithmic negativity and quantum steering of the two modes, we show that, different choices of the modulation intensity and the relative phase between the two physical interaction paths can either enhance or cancel the desired quantum effects, two modes can be prepared into an entangled steady state with asymmetric and directional steering. Meanwhile, the effects of interference on entanglement and asymmetric steering are also compared. The results show that the optimal relative phase between the two physical interaction paths are not the same for entanglement and asymmetric steering, opening new perspectives to understand them.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
