A Dirac Sea for a General Non-Inertial Observer In Flat 1+1 Dimensional   Spacetime
  A coordinate system is set up for a general accelerating observer and is used to determine the particle content of the Dirac vacuum for that observer. Equations are obtained for the spatial distribution and total number of particles for massless fermions as seen by this observer, generalising previous work. 
Mark D. Goodsell, Carl E. Dolby, Stephen F. Gull