Ferromagnetism in spinor bosons Prototypical Bose system: 4He scalar particles does not display magnetism at all Alkali atoms: 23Na.8/rb Atomic bosons have(hyperfine) spin degree of freedom Atomic bosons now can be confined in purely optical traps Q. Gu, Ferromagnetic phase transition in spinor Bose gases, Chapter 6 Progress in Ferromagnetism Research(Nova Science Publishers, New York, 2006)• Prototypical Bose system: 4He scalar particles does not display magnetism at all • Alkali atoms: 23Na, 87Rb,... Atomic bosons have (hyperfine) spin degree of freedom Atomic bosons now can be confined in purely optical traps Ferromagnetism in spinor bosons Q. Gu, Ferromagnetic phase transition in spinor Bose gases, Chapter 6, Progress in Ferromagnetism Research (Nova Science Publishers, New York, 2006)