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Qubit-pair entanglement protection versus induced spectral localization under the influence of an external classical field and effective nonlinearities

Author

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  • Ateto, M.S.
  • Jaradat, Emad K.
  • Abo-Dahab, S.M.

Abstract

We propose a scheme for sensing qubit–qubit entanglement through the controlled alignment between the entanglement protection and spectral localization in a Kerr-type nonlinear cavity with intensity-dependent Stark shifts under a classical driving. Importantly, we demonstrate that the classical pump amplitude, Kerr nonlinearity, and Stark shift act cooperatively to reshape the dressed-state structure of the driven cavity-qubit system, such that the bipartite entanglement, Wigner phase-space interference, and atomic spectral response become parallel manifestations of the same underlying light–matter coherence.

Suggested Citation

  • Ateto, M.S. & Jaradat, Emad K. & Abo-Dahab, S.M., 2026. "Qubit-pair entanglement protection versus induced spectral localization under the influence of an external classical field and effective nonlinearities," Chaos, Solitons & Fractals, Elsevier, vol. 209(P2).
    • Handle: RePEc:eee:chsofr:v:209:y:2026:i:p2:s0960077926005709
    DOI: 10.1016/j.chaos.2026.118429
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