  We study, within Ginzburg-Landau theory, the responses of three-flavor
superfluid quark-gluon plasmas to external magnetic fields and rotation, in
both the color-flavor locked and isoscalar color-antitriplet diquark phases
near the critical temperature. Fields are incorporated in the gradient energy
arising from long wavelength distortions of the condensate, via covariant
derivatives to satisfy local gauge symmetries associated with color and
electric charge. Magnetic vortex formation, in response to external magnetic
fields, is possible only in the isoscalar phase; in the color-flavor locked
phase, external magnetic fields are incompletely screened by the Meissner
effect. On the other hand, rotation of the superfluid produces vortices in the
color-flavor locked phase; in the isoscalar phase, it produces a London
gluon-photon mixed field. We estimate the coherence and Meissner lengths and
critical magnetic fields for the two phases.
