Magnitnoe Uporyadochenie Bol'shikh Spinov

V rabote predlozhen edinyy podkhod k opisaniyu spinovogo uporyadocheniya v sistemakh tozhdestvennykh chastits, spin kotorykh prevyshaet 1/2, ili v sistemakh "bol'shikh" spinov. Primerom takikh sistem yavlyayutsya kholodnye atomnye gazy, nakhodyashchiesya v sostoyanii blizkom k kondensatsii Fermi ili Boze , nizkorazmernye tsepochki ionov so spinami 1 ili 3/2, a takzhe kooperativnye mnogourovnevye atomnye sistemy v rezhime sverkhizlucheniya. Gamil'tonian takikh sistem zapisyvaetsya v vide operatorov, opredelyennykh v spinovom prostranstve, podobnykh operatoru Geyzenberga - Diraka - van-Fleka, no vklyuchayushchikh v sebya krome bilineynykh form eshchye i kombinatsii etikh operatorov v razlichnykh stepenyakh. Takoy podkhod primenim i dlya opisaniya uporyadocheniya energeticheskikh spinov, ili psevdospinov, v kooperativnykh sistemakh mnogourovnevykh atomov.