Ground-state properties of the two-dimensional charged Bose gas - art. no.104505

We study the two-dimensional gas of charged bosons interacting via a logari thmic potential within the quantal hypernetted-chain approximation. The pai r correlation function, the static structure factor, the ground state energ y, and the spectrum of collective excitations are calculated over a range o f the density parameter r(s). We find that the static and dynamical propert ies are described rather well in this approach in comparison to previous th eories. Our results are in good agreement with the available quantum Monte Carlo simulations.