The decoherence of high-dimensional orbital angular momentum(OAM)entanglement in the weak scintillation regime has been investigated.In this study,we simulate atmospheric turbulence by utilizing a multiple-phase scree...The decoherence of high-dimensional orbital angular momentum(OAM)entanglement in the weak scintillation regime has been investigated.In this study,we simulate atmospheric turbulence by utilizing a multiple-phase screen imprinted with anisotropic non-Kolmogorov turbulence.The entanglement negativity and fidelity are introduced to quantify the entanglement of a high-dimensional OAM state.The numerical evaluation results indicate that entanglement negativity and fidelity last longer for a high-dimensional OAM state when the azimuthal mode has a lower value.Additionally,the evolution of higher-dimensional OAM entanglement is significantly influenced by OAM beam parameters and turbulence parameters.Compared to isotropic atmospheric turbulence,anisotropic turbulence has a lesser influence on highdimensional OAM entanglement.展开更多
We find a new complex integration-transform which can establish a new relationship between a two-mode operator's matrix element in the entangled state representation and its Wigner function. This integration keeps...We find a new complex integration-transform which can establish a new relationship between a two-mode operator's matrix element in the entangled state representation and its Wigner function. This integration keeps modulus invariant and therefore invertible. Based on this and the Weyl–Wigner correspondence theory, we find a two-mode operator which is responsible for complex fractional squeezing transformation. The entangled state representation and the Weyl ordering form of the two-mode Wigner operator are fully used in our derivation which brings convenience.展开更多
The entangled orbital angular momentum(OAM)photons propagating across a weakly turbulent atmosphere are investigated.Here,the paper uses the single-phase screen model based on the Kolmogorov theory of turbulence,and f...The entangled orbital angular momentum(OAM)photons propagating across a weakly turbulent atmosphere are investigated.Here,the paper uses the single-phase screen model based on the Kolmogorov theory of turbulence,and focuses on the influence of the backward scattering on OAM evolution.The results indicate that backward scattering plays an important role in the analysis of OAM entanglement evolution in the turbulent atmosphere.It cannot be negligible especially for higher-order OAM mode.Moreover,when OAM mode is greater than 4,entangled photon pairs composed of higher OAM modes are not more robust in turbulence within the weak scintillation regime.These results will be useful in future investigations of OAM-based optical wave propagation through turbulent atmosphere.展开更多
基金supported by the Project of the Hubei Provincial Department of Science and Technology(Grant Nos.2022CFB957,2022CFB475)the National Natural Science Foundation of China(Grant No.11847118)。
文摘The decoherence of high-dimensional orbital angular momentum(OAM)entanglement in the weak scintillation regime has been investigated.In this study,we simulate atmospheric turbulence by utilizing a multiple-phase screen imprinted with anisotropic non-Kolmogorov turbulence.The entanglement negativity and fidelity are introduced to quantify the entanglement of a high-dimensional OAM state.The numerical evaluation results indicate that entanglement negativity and fidelity last longer for a high-dimensional OAM state when the azimuthal mode has a lower value.Additionally,the evolution of higher-dimensional OAM entanglement is significantly influenced by OAM beam parameters and turbulence parameters.Compared to isotropic atmospheric turbulence,anisotropic turbulence has a lesser influence on highdimensional OAM entanglement.
基金Project supported by the National Natural Science Foundation of China(Grant No.11775208)Key Projects of Huainan Normal University,China(Grant No.2019XJZD04)。
文摘We find a new complex integration-transform which can establish a new relationship between a two-mode operator's matrix element in the entangled state representation and its Wigner function. This integration keeps modulus invariant and therefore invertible. Based on this and the Weyl–Wigner correspondence theory, we find a two-mode operator which is responsible for complex fractional squeezing transformation. The entangled state representation and the Weyl ordering form of the two-mode Wigner operator are fully used in our derivation which brings convenience.
基金Project supported by the Major Research Plan of the National Natural Science Foundation of China(Grant No.11847118)。
文摘The entangled orbital angular momentum(OAM)photons propagating across a weakly turbulent atmosphere are investigated.Here,the paper uses the single-phase screen model based on the Kolmogorov theory of turbulence,and focuses on the influence of the backward scattering on OAM evolution.The results indicate that backward scattering plays an important role in the analysis of OAM entanglement evolution in the turbulent atmosphere.It cannot be negligible especially for higher-order OAM mode.Moreover,when OAM mode is greater than 4,entangled photon pairs composed of higher OAM modes are not more robust in turbulence within the weak scintillation regime.These results will be useful in future investigations of OAM-based optical wave propagation through turbulent atmosphere.
