%0 Journal Article %J Science %D 2013 %T A quantum many-body spin system in an optical lattice clock %A M J Martin %A Bishof, M %A Swallows, M D %A X Zhang %A C Benko %A J von-Stecher %A Alexey V. Gorshkov %A Rey, A M %A Jun Ye %B Science %V 341 %P 632 %G eng %U http://www.sciencemag.org/content/341/6146/632.abstract