Steady state quantum discord for circularly accelerated atoms

Muhammad Asif Ramzan

Eman G. El-Hadidy, Ahmed Farouk, Mahmoud Abdel‐Aty +1 more

Xiang-Ping Liao, Jianshu Fang, Mao-Fa Fang +1 more

Zhong Ju Liu, Hailing Miao, Wei Jiang +1 more

Jiasen Jin, Chang‐shui Yu, Pei Pei +1 more

We discuss the creation of quantum discord between two two-level atoms trapped in an optical cavity in a noisy environment. It is shown that nonzero steady-state quantum discord between atoms can be obtained when the white-noise field is separately imposed on atoms or cavity mode, while the steady-state quantum discord reaches zero if both cavity mode and atoms are driven simultaneously by white-noise fields. In particular, we demonstrate that white-noise field in different cases can play a variously constructive role in the generation of quantum discord.

Jun-Qing Cheng, Wei Wu, Jing‐Bo Xu

We investigate the effect of quantum-jump-based feedback on the dynamics of quantum discord for two noninteracting two-level atoms coupled to a single mode of the cavity field with and without the rotating-wave approximation. It is found that the counterrotating terms can be helpful for generating steady states, and the value of steady-state quantum discord can be increased to approach 1 in the long-time limit by feedback controls. Furthermore, we also explore the influence of the time evolutions of mean excitation number in total systems and atomic subsystems on the quantum correlations and show that the enhancement of mean excitation number in atomic subsystems by feedback controls leads to the high value of steady-state quantum discord.