huli2023/universality-in-ultradilute-symmetric-liquid-bose-bose-mixtures

Accompanying material to: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.99.023618

Universality in Ultradilute Symmetric Liquid Bose-Bose Mixtures

Accompanying code to: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.99.023618

preprint in: https://arxiv.org/abs/1811.04436

Contains a python script "find_R_from_a12_reff.py" where one can determine the diameter of attractive square well from the input s-wave scattering length and effective range reff. Works only for reff>0, a12<0, for a potential which does not support a two-body bound state.

In a script "quantum_bose-bose_mixture_functional.py", one can also calculate energy per particle for a given density, s-wave scattering length a12<0 and effective range reff>0 of the attractive interactions.
In both scripts, density is in units $a_{11}^{-3}$, lengths in units $a_{11}$, and energy in $\hbar^2 / (2 m a_{11}^2)$.

In the notebook https://colab.research.google.com/github/viktorcikojevic/Square-well-range-R-a12-reff-/blob/master/interactive_eos_symmetric_mixture.ipynb is an interactive graph, where you can compare the QMC based functional with the MF+LHY in your web browser! You just need to open it in Google Colab and run the first and only cell.