Hydrogen atom in a quantum plasma environment under the influence of   Aharonov-Bohm flux and electric and magnetic fields
  This study presents the confinement influences of Aharonov-Bohm-flux (AB-flux), electric and magnetic fields directed along $z$-axis and encircled by quantum plasmas, on the hydrogen atom. The all-inclusive effects result to a strongly attractive system while the localizations of quantum levels change and the eigenvalues decrease. We find that, the combined effect of the fields is stronger than solitary effect and consequently, there is a substantial shift in the bound state energy of the system. We also find that to perpetuate a low-energy medium for hydrogen atom in quantum plasmas, strong electric field and weak magnetic field are required, where AB-flux field can be used as a regulator. The application of perturbation technique utilized in this paper is not restricted to plasma physics, it can also be applied in molecular physics. 
Babatunde James Falaye, Guo-Hua Sun, Ram\'on Silva-Ortigoza, Shi-Hai   Dong
quant-ph physics.plasm-ph