FACt: FORTRAN toolbox for calculating fluctuations in atomic condensates
Abstract
We develop a FORTRAN code to compute fluctuations in atomic condensates (FACt) by solving the Bogoliubov-de Gennes (BdG) equations for two component Bose-Einstein condensate (TBEC) in quasi two dimensions. The BdG equations are recast as matrix equations and solved self consistently. The code is suitable for handling quantum fluctuations as well as thermal fluctuations at temperatures below the critical point of Bose-Einstein condensation. The code is versatile, and the ground state density profile and low energy excitation modes obtained from the code can be easily adapted to compute different properties of TBECs -- ground state energy, overlap integral, quasi particle amplitudes of BdG spectrum, dispersion relation and structure factor and other related experimental observables.
Cite
@article{arxiv.1806.01244,
title = {FACt: FORTRAN toolbox for calculating fluctuations in atomic condensates},
author = {Arko Roy and Sukla Pal and S. Gautam and D. Angom and P. Muruganandam},
journal= {arXiv preprint arXiv:1806.01244},
year = {2020}
}
Comments
The manuscript contains 28 pages and 6 figures. The code including sample input file and README file can be found in a tar file 'hfb2d2s.tar' by clicking on the "other formats" in the paper download page