Topical issue on cold quantum matterGerhard Birkl, Christopher Foot, Tim Freegarde, Rudolf Grimm, Jeremy M. Hutson and Matthias WeidemüllerEur. Phys. J. D, 65 1-2 (2011) 1-2DOI: https://doi.org/10.1140/epjd/e2011-20555-7