Frustrated quantum antiferromagnetism with ultracold bosons in a triangular lattice A. Eckardt, P. Hauke, P. Soltan-Panahi, C. Becker, K. Sengstock and M. Lewenstein EPL, 89 1 (2010) 10010 Published online: 21 January 2010 DOI: 10.1209/0295-5075/89/10010