Chinese Journal of Quantum Electronics, Volume. 38, Issue 4, 496(2021)

Entanglement degradation of photon entangled states in non-Kolmogorov atmospheric turbulence

Qinwei ZHANG*... Lianzhen CAO, Xia LIU, Yang YANG, Jiaqiang ZHAO and Yingde LI |Show fewer author(s)
Author Affiliations
  • [in Chinese]
  • show less

    Based on the theory of non-Kolmogorov atmospheric turbulence spectrum, a mathematical model of spatial two-qubit entangled states propagation in non-Kolmogorov atmospheric turbulence is established, the corresponding mathematical expression of entanglement degradation is obtained, and the influence of non-Kolmogorov turbulence on the entanglement of spatial two-qubit states is analyzed by numerical simulation. The results show that high entanglement of the spatial two-qubit entangled states can be maintained when the physical size and separation between each signal and the corresponding idler apertures is small. Moreover, it is found that when the long wavelength entangled photons propagate through non-Kolmogorov atmospheric turbulence with larger generalized refractive-index exponent parameter α and generalized refractive-index structure parameter C~2n, the entanglement degradation is relatively weak. The proposed model can be used to quantitatively analyze the entanglement degradation, which is helpful for long distance self-adaption quantum communication with low bit error rate.

    Tools

    Get Citation

    Copy Citation Text

    ZHANG Qinwei, CAO Lianzhen, LIU Xia, YANG Yang, ZHAO Jiaqiang, LI Yingde. Entanglement degradation of photon entangled states in non-Kolmogorov atmospheric turbulence[J]. Chinese Journal of Quantum Electronics, 2021, 38(4): 496

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Feb. 19, 2021

    Accepted: --

    Published Online: Sep. 1, 2021

    The Author Email: Qinwei ZHANG (qwzhang@wfu.edu.cn)

    DOI:10.3969/j.issn.1007-5461. 2021.04.012

    Topics