BINARY-MIXTURES OF BOSE CONDENSATES OF ALKALI ATOMS

We show that binary mixtures of Base condensates of alkali atoms have a great variety of ground state and vortex structures which can be acc essed experimentally by varying the particle numbers of different alka lis. We have constructed a simple algorithm to determine the density p rofiles of the mixtures within Thomas-Fermi approximation. Many struct ures of the alkali binary contain a coexisting region, which is the an alog of the long sought He-3-He-4 interpenetrating superfluids in ultr alow temperature physics.