2025/01/24 by Antonio Tavera, H. Olivares-Pilón, Tavera, A. N. Mendoza +5
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Physics (quant-ph) #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.2501.14297
openalex publication_date 2025/01/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the present study, we consider the hydrogen atom confined within an impenetrable infinite cylindrical cavity of radius ρ0 in the presence of a constant magnetic field \bf B = B \bf z oriented along the main cylinder's axis. In the Born-Oppenheimer approximation, anchoring the nucleus to the geometric center of the cylinder, a physically meaningful 3-parametric trial function is used to determine the ground state energy E of the system. This trial function incorporates the exact symmetries and key limiting behaviors of the problem explicitly. In particular, it does not treat the Coulomb potential nor the magnetic interaction as a perturbation. The novel inclusion of a variational cut-off factor (1 - (\fracρρ0)ν), ν≥ 1, appears to represent a significant improvement compared to the non-variational cut off factors commonly employed in the literature. The dependence of the total energy E=E(ρ0, B) and the binding energy Eb=Eb(ρ0, B) on the cavity radius ρ0 ∈ [0.8, 5] a.u. and the magnetic field strength B∈ [0.0, 1.0] a.u. is presented in detail. The expectation values ⟨ ρ⟩ and ⟨|z| ⟩, and the Shannon entropy in position space are computed to provide additional insights into the system's localization. A brief discussion is provided comparing the 2D and 3D cases as well.