The nonideal collective and plasma screening effects on the entanglement fidelity in elastic collisions are investigated in classical nonideal plasmas. The entanglement fidelity in nonideal plasmas is obtained as a function of the nonideality plasma parameter, Debye length, and collision energy. It is found that the plasma screening effect significantly increases the entanglement fidelity, especially for low collision energies. The entanglement fidelity is found to decrease with increasing collision energy. It is also found that the collective effect enhances the entanglement fidelity in nonideal plasmas.
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The anisotropic plasma screening effects on the eikonal scattering cross section for the electron-ion elastic collision are investigated in anisotropic plasmas in the presence of an externally applied magnetic field. The second-order eikonal analysis is employed to investigate the elastic collision process in magnetized plasmas. The classical straight line trajectory method is applied to the motion of the projectile electron in order to investigate the variation of the second-order eikonal phase as a function of the impact parameter and plasma parameters. The result shows that the major contribution of the magnetic field effect is found to be given by the second-order eikonal phase. It is also found that the eikonal scattering cross section including the anisotropic screening effect described by the effective interaction potential is always greater than that including the static screening effect obtained by the Debye-Hückel model. In addition, it is found that the eikonal cross section has the maximum value when the rotational energy with the Larmor frequency is equal to the thermal energy.
The dynamic screening effects on elastic electron-ion collisions are investigated in nonideal plasmas. The second-order eikonal method with the impact parameter analysis is employed to obtain the eikonal phase as a function of the impact parameter, collision energy, thermal energy, and Debye length. The result shows that the eikonal phase decreases with increasing the thermal energy. It is also found that the dynamic screening effects on the eikonal phase are more significant for large impact parameters. The total eikonal cross section is also found to be decreased with increasing the thermal energy. It is important to note that the eikonal cross section and the eikonal phase including the dynamic screening effects are found to be greater than those including the static screening effects.
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