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Paper   IPM / Physic / 12465
School of Physics
  Title:   Theory of Correlations in Strongly Interacting Fluids of Two-Dimensional Dipolar Bosons
  Author(s): 
1.  S. Abedinpour
2.  R. Asgari
3.  M. Polini
  Status:   Published
  Journal: Phys. Rev. A
  Vol.:  86
  Year:  2012
  Pages:   043601
  Supported by:  IPM
  Abstract:
Ground-state properties of a two-dimensional fluid of bosons with repulsive dipole-dipole interactions are studied by means of the Euler-Lagrange hypernetted-chain approximation. We present a self-consistent semi-analytical theory of the pair distribution function g(r) and ground-state energy of this system. Our approach is based on the solution of a zero-energy scattering Schrödinger equation for the "pair amplitude" √{g(r)} with an effective potential from Jastrow-Feenberg correlations. We find excellent agreement with quantum Monte Carlo results over a wide range of coupling strenght, nearly up to the critical coupling for the liquid-to-crystal quantum phase transition. We also calculate the one-body density matrix and related quantities, such as the momentum distribution function and the condensate fraction.

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