Phase diagrams of F=2 spinor Bose-Einstein condensates - art. no. 033607

We show that there are three possible phases for a spin-2 spinor Bose conde nsate, one more compared to the spin-1 case. The order parameters of these phases are the spontaneous magnetization and the singlet pair amplitude. Cu rrent estimates of scattering lengths show that all three phases have reali zations in optically trapped alkali atoms. There is also a one-to-one corre spondence between the structure of a spin-2 spinor Bose condensate and that of a d-wave BCS superfluid.