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Universality in ultradilute liquid Bose-Bose mixtures
We have studied dilute Bose-Bose mixtures of atoms with attractive interspecies and repulsive intraspecies interactions using quantum Monte Carlo methods at T=0. Using a number of models for interactions, we determine the range of validity of the universal equation of state of the symmetric liquid mixture as a function of two parameters: the s-wave scattering length and the effective range of the interaction potential. It is shown that the Lee-Huang-Yang correction is sufficient only for extremely dilute liquids with the additional restriction that the range of the potential is small enough. Based on the quantum Monte Carlo equation of state we develop a density functional which goes beyond the Lee-Huang-Yang term and use it together with the local density approximation to determine density profiles of realistic self-bound drops.Postprint (published version
Mean Value from Representation of Rational Number as Sum of Two Egyptian Fractions
For given positive integers and , let denote the number of
positive integer solutions of the Diophantine equation Write Recently Jingjing Huang and R. C. Vaughan proved that
for and , there is an asymptotic formula In this paper, we shall get a more explicit
expression with better error term for
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