DQMC for Hubbard model Hall effect study

DQMC source code for Hall effect study for single band Hubabrd model.

The unequal imaginary time measurements "j2j2" are used to calculate the Hall coefficient, as reported in the "Method" section in the paper  "DC Hall coefficient of the strongly correlated Hubbard model"(DOI:10.1038/s41535-020-00254-w).

For the most up-to-date version please refer to github: https://github.com/wenowang96/Determinant-QMC(under maintenance)

ArXiv preprint at: https://arxiv.org/abs/2002.12289

Publication: npj Quantum Materials (2020)5:51; https://doi.org/10.1038/s41535-020-00254-w