Squeezed vacua in loop quantum gravity
  We introduce squeezed vacua in loop quantum gravity, a new overcomplete basis of states that contain prescribable correlations between geometric operators. We study the behavior of long-range correlations and discuss the relevance of these states for the reconstruction of a semiclassical spacetime from loop quantum gravity. 
Eugenio Bianchi, Jonathan Guglielmon, Lucas Hackl, Nelson Yokomizo
gr-qc hep-th