Alon Ofir E, Streltsov Alexej I, Cederbaum Lorenz S
Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany.
Phys Rev Lett. 2006 Dec 8;97(23):230403. doi: 10.1103/PhysRevLett.97.230403. Epub 2006 Dec 6.
Mixtures of cold bosonic atoms in optical lattices undergo demixing on different length scales with increasing interspecies repulsion. As a general rule, the stronger the intraspecies interactions, the shorter is this length scale. The wealth of phenomena is documented by illustrative examples on both superfluids and Mott insulators.