Frustrated quantum antiferromagnetism with ultracold bosons in a triangular latticeA. Eckardt, P. Hauke, P. Soltan-Panahi, C. Becker, K. Sengstock and M. LewensteinEPL, 89 1 (2010) 10010DOI: https://doi.org/10.1209/0295-5075/89/10010