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Paper   IPM / Physic / 6761
School of Physics
  Title:   Ground-State Properties of the Two-Dimensional Bose Gas
  Author(s): 
1.  B. Davoudi
2.  E. Strepparola
3.  B. Tanatar
4.  M.P. Tosi
  Status:   Published
  Journal: Phys. Rev. B
  No.:  48
  Vol.:  63
  Year:  2001
  Pages:   104505-1-6
  Supported by:  IPM
  Abstract:
We study the two-dimensional gas of charged bosons interacting via a logarithmic potential within the quantal hypernetted-chain approximation. The pair correlation function, the static structure factor, the ground-state energy, and the spectrum of collective excitations are calculated over a range of the density parameter rs. We find that the static and dynamical properties are described rather well in this approach in comparison to previous theories. Our results are in good agreement with the available quantum Monte Carlo simulations.

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