The role of potential in the ghost-condensate dark energy model
  We consider the ghost-condensate model of dark energy with a generic potential term. The inclusion of the potential is shown to give greater freedom in realising the phantom regime. The self-consistency of the analysis is demonstrated using WMAP7+BAO+Hubble data. 
Gour Bhattacharya, Pradip Mukherjee, Anirban Saha, Amit Singha Roy
gr-qc astro-ph.CO hep-ph hep-th