TY - JOUR AU - Albareti, F. D. AU - Ruiz Cembranos, José Alberto AU - López Maroto, Antonio PY - 2014 DO - 10.1103/PhysRevD.90.123509 SN - 1550-7998 UR - https://hdl.handle.net/20.500.14352/33913 T2 - Physical review D AB - We consider the vacuum energy of massive quantum fields in an expanding universe. We define a conserved renormalized energy-momentum tensor by means of a comoving cutoff regularization. Using exact solutions for de Sitter space-time, we show that in a... LA - eng PB - American Physical Society TI - Vacuum energy as dark matter TY - journal article VL - 90 ER -