• Viscosity-induced crossing of the phantom divide in the dark cosmic fluid 

      Brevik, Iver Håkon (Journal article; Peer reviewed, 2013-12-10)
      Choosing various natural forms for the equation-of-state parameter w and the bulk viscosity ζ, we discuss how it is possible for a dark energy fluid to slide from the quintessence region across the divide w = −1 into the ...