On holography for (pseudo-)conformal cosmology
  We propose a holographic dual for (pseudo-)conformal cosmological scenario, with a scalar field that forms a moving domain wall in adS_5. The domain wall separates two vacua with unequal energy densities. Unlike in the existing construction, the 5d solution is regular in the relevant space-time domain. 
M. Libanov, V. Rubakov and S. Sibiryakov
hep-th astro-ph.CO gr-qc