Quintessence and phantom dark energy from ghost D-branes
  We present a novel dark energy candidate, based upon the existence and
dynamics of Ghost D-branes in a warped compactification of type IIB string
theory. Gp-branes cancel the combined BPS sectors of the Dp-branes, while they
preserve the same supersymmetries. We show that this scenario can naturally
lead to either quintessence or phantom-like behaviors, depending on the form of
the involved potentials and brane tension.
