Fractional dark energy

In this paper we introduce the fractional dark energy model, in which accelerated expansion of Universe is driven by a nonrelativistic gas (composed either fermions or bosons) with noncanonical kinetic term. The inversely proportional to cube absolute value momentum for fluid an equation state parameter equal minus one, and whose corresponding density mimics one cosmological constant. general case, (times three) precisely exponent We show that inverse operator appears quantum mechanics it Riesz derivative. observed vacuum can be obtained through integral Fermi-Dirac (or Bose-Einstein) distribution lowest allowed particles. Finally, possible thermal production fate investigated.