  We use gauge/string duality to model a doubly heavy diquark in a color
antitriplet moving in a thermal plasma at temperatures near the critical. With
the assumption that there is no relative motion between the constituents, we
calculate the drag force on the diquark. At high enough speed we find that
diquark string configurations develop a cusp. In addition, we estimate the
spatial string tension at non-zero baryon chemical potential, and also briefly
discuss an extension to a triply heavy triquark in a color triplet.
