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Thermal and intrinsic decoherence effects on the dynamics of two three-level moving atomic system

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  • Jamal Anwar, S.
  • Ramzan, M.
  • Usman, M.
  • Khalid Khan, M.

Abstract

We investigate the quantum Fisher information (QFI) and quantum entanglement (QE) dynamics of moving two three-level atoms interacting with a thermal field. The time evolution of the quantum system is studied numerically under the effect of intrinsic decoherence (ID) in a thermal environment. ID and thermal environment play a critical role during the time evolution of the quantum system. It is found that QE changes drastically when ID increases in the absence of atomic motion. However, a periodic behavior of QE is observed in the case of moving atoms. The thermal environment is seen to have a prominent effect on QFI in the presence of ID. Moreover, the decay of QE is further suppressed at larger time-scales which ensures the enhanced influence of ID on the system’s dynamics in a thermal environment. However, QFI and QE saturate to a lower level at larger time-scales under these environments. The behavior of QFI and QE is opposite to each other under these environments. Furthermore, it is seen that the thermal environment induces a faster decay of QE as compared to the decay induced by ID. Therefore, ID diminishes the degree of QE for higher-dimensional quantum systems. Moreover, the system’s dynamics changes remarkably by increasing the mean number of photons.

Suggested Citation

  • Jamal Anwar, S. & Ramzan, M. & Usman, M. & Khalid Khan, M., 2020. "Thermal and intrinsic decoherence effects on the dynamics of two three-level moving atomic system," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 549(C).
    • Handle: RePEc:eee:phsmap:v:549:y:2020:i:c:s0378437120300893
    DOI: 10.1016/j.physa.2020.124297
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    References listed on IDEAS

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    1. Abdel-Khalek, S., 2008. "The effect of atomic motion and two-quanta JCM on the information entropy," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 387(4), pages 779-786.
    2. Obada, A.-S.F. & Abdel-Khalek, S. & Plastino, A., 2011. "Information quantifiers’ description of weak field vs. strong field dynamics for a trapped ion in a laser field," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 390(3), pages 525-533.
    3. Obada, A.-S.F. & Abdel-Khalek, S., 2010. "Entanglement evaluation with atomic Fisher information," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 389(4), pages 891-898.
    4. Ole E. Barndorff‐Nielsen & Richard D. Gill & Peter E. Jupp, 2003. "On quantum statistical inference," Journal of the Royal Statistical Society Series B, Royal Statistical Society, vol. 65(4), pages 775-804, November.
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    Cited by:

    1. Mohamed, A.-B.A. & Hessian, H.A. & Obada, A.-S.F., 2021. "Nonclassical effects in a nonlinear two trapped-particles system under intrinsic decoherence," Chaos, Solitons & Fractals, Elsevier, vol. 146(C).

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