Ground-state structure and thermodynamics of Yukawa Bose fluids in dimensionality D = 3 and D = 2

We evaluate the structure and the thermodynamic properties (internal energy , pressure and compressibility) of zero-temperature fluids of Bose particle s interacting via the Yukawa potential in dimensionality D = 3 and D = 2. T hese systems provide simplified models for nuclear matter in D = 3 and for assemblies of flux lines in high-T-c superconductors in D = 2. Our calculat ions are based on the dielectric formalism, with short-range correlations b eing treated in the self-consistent scheme of Singwi et al. In both dimensi onalities our results for the ground-state energy demonstrate a crucial rol e of short-range correlations and are in good agreement with those of varia tional and diffusion Monte Carlo studies over extended ranges of values for the system parameters (reduced DeBoer length and reduced particle density) . Reasonable agreement is also found for the pressure with the available di ffusion Monte Carlo data in D = 2. The extent of the deviations from the co mpressibility sum rule in the theory is assessed for both dimensionalities. On all the above grounds it appears that the present approach is quite acc urate for the high-density fluid and provides a useful starting point for f ully quantitative studies of the low-density fluid.