Demler, EugeneZhou, Fei2016-08-262002Demler, Eugene, and Fei Zhou. 2002. “Spinor Bosonic Atoms in Optical Lattices: Symmetry Breaking and Fractionalization.” Physical Review Letters 88 (16) (April 3). doi:10.1103/physrevlett.88.163001.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:27988568We study superfluid and Mott insulator phases of cold spin-1 Bose atoms with antiferromagnetic in- teractions in an optical lattice, including a usual polar condensate phase, a condensate of singlet pairs, a crystal spin nematic phase, and a spin singlet crystal phase. We suggest a possibility of exotic fraction- alized phases of spinor Bose-Einstein condensates and discuss them in the language of Z2 lattice gauge theory.en-USJournal Article2016-08-2610.1103/PhysRevLett.88.163001