Quantum degeneracy of mixed strontium gases

We have attained quantum degeneracy in a mixture of $^{88}$Sr (bosons) and $^{87}$Sr (fermions). A Bose-Einstein condensate of $^{88}$Sr, which has attractive interactions, is produced via sympathetic cooling using $^{87}$Sr.~Simultaneously, we have demonstrated Fermi degeneracy of $^{87}$Sr by observing the difference in the sizes of the atom cloud, due to the Fermi pressure, between degenerate $^{87}$Sr and $^{88}$Sr.