GROUND-STATE OF A 2-DIMENSIONAL CHARGED-BOSON SYSTEM

The ground state of a two-dimensional charged-boson system is investigated over the range of densities 1 Rs 10 in the self-consistent-field approximation; Rs=(a02)-1/2, where a0 is the Bohr radius and is the number density. Starting with numerical self-consistent calculations of the static structure factor, the elementary excitation, pair-correlation functions, pressure, and ground-state energy are evaluated. These results are compared with those of the two-dimensional and three-dimensional systems obtained from other methods. The ground-state energy is given as E0=-1.2918Rs-2/3+0.03, which improves that result from the ring-diagram approximation. © 1990 The American Physical Society.