2020/03/31 by Abdallah Slaoui, Ahmed Salah, Mohammed Daoud +1
Computer Science · Physics and Astronomy · #Atomic physics #Cavity quantum electrodynamics #Coherence (philosophical gambling strategy) #Electric field #Excited state #Field (mathematics) #Open quantum system #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum decoherence #Quantum mechanics #Quantum optics #Quantum optics and atomic interactions #Quantum-confined Stark effect #Spectroscopy and Quantum Chemical Studies #Stark effect #quant-ph
paper · pdf · doi:10.1016/j.physa.2020.124946
Published version in Physica A, 12 pages and 14 figures
openalex publication_date 2020/07/17 · arxiv created 2020/07/18 · arxiv updated 2020/07/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
An exact analytic solution for two two-level atoms coupled with a multi-photon single-mode electromagnetic cavity field in the presence of the Stark shift is derived. We assume that the field is initially prepared in a coherent state and the two atoms are initially prepared in an excited state. Considering the atomic level shifts generated by the Stark shift effect, the dynamical behavior of both quantum coherence (QC) measured using a quantum Jensen-Shannon divergence and of quantum correlations captured by quantum discord (QD) are investigated. It is shown that the intensity-dependent Stark-shift in the cavity and the number of coherent state photons plays a key role in enhancing or destroying both QC and QD during the process of intrinsic decoherence. We remarked that increasing the Stark-shift parameters, the frequencies of the transition for the mode of the cavity field, and photons number destroy both the amount of QC and QD and effected their periodicity. More importantly, QC and QD exhibit similar behavior and both show a revival phenomenon. We believe that the present work shows that the quantum information protocols based on physical resources in optical systems could be controlled by adjusting the Stark-shift parameters.