A. Maria Rey, Burnett, K., Roth, R., Edwards, M., Williams, C. J., and Clark, C. W.,
“Bogoliubov approach to superfluidity of atoms in an optical lattice”,
Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 36, no. 5, pp. 825 - 841, 2003.
R. Mathew, Kumar, A., Eckel, S., Jendrzejewski, F., Campbell, G. K., Edwards, M., and Tiesinga, E.,
“Self-heterodyne detection of the \it in-situ phase of an atomic-SQUID”,
Physical Review A, vol. 92, no. 3, p. 033602, 2015.