Dynamical protection of quantum steering and fidelity dynamics in the double Jaynes-Cummings model
Abstract
We investigate the dynamics of Einstein-Podolsky-Rosen (EPR) steering in a double Jaynes-Cummings model, where two initially entangled spatially separated two-level atoms in two cavities interact with independent cavity modes. We study how the intrinsic noise in an initial Werner-type state affects the steering dynamics in this type of quantum optical system. We also analyze the evolution of steering under experimentally relevant conditions, including atom-cavity detuning and dipole-dipole interactions. We find that both detuning and dipole-dipole coupling help reduce steering sudden death in the system. We further identify a direct correlation between steering and state fidelity, revealing a threshold below which steering disappears. This suggests that fidelity may serve as a practical indicator of steerability in cavity QED systems. Our results provide insight into the controllability and robustness of non-classical correlations in realistic light-matter platforms.
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BibTeX
@misc{mandal2026dynamical,
title = {{Dynamical protection of quantum steering and fidelity dynamics in the double Jaynes-Cummings model}},
author = {Koushik Mandal and Shohini Ghose and Chitra Rangan},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2608.17217},
eprint = {2608.17217},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.17217},
}
RIS
TY - UNPB
TI - Dynamical protection of quantum steering and fidelity dynamics in the double Jaynes-Cummings model
AU - Koushik Mandal
AU - Shohini Ghose
AU - Chitra Rangan
PY - 2026
DA - 2026/09/25
PB - arXiv
DO - 10.48550/arxiv.2608.17217
UR - https://arxiv.org/abs/2608.17217
AB - We investigate the dynamics of Einstein-Podolsky-Rosen (EPR) steering in a double Jaynes-Cummings model, where two initially entangled spatially separated two-level atoms in two cavities interact with independent cavity modes. We study how the intrinsic noise in an initial Werner-type state affects the steering dynamics in this type of quantum optical system. We also analyze the evolution of steering under experimentally relevant conditions, including atom-cavity detuning and dipole-dipole interactions. We find that both detuning and dipole-dipole coupling help reduce steering sudden death in the system. We further identify a direct correlation between steering and state fidelity, revealing a threshold below which steering disappears. This suggests that fidelity may serve as a practical indicator of steerability in cavity QED systems. Our results provide insight into the controllability and robustness of non-classical correlations in realistic light-matter platforms.
ER -