I think this is quite an old idea. I remember going to a lecture in Leicester at a "Science Café" meeting about it. Unfortunately I can't recall the speaker's name. -I just did a search and came up with his name: Mark Hadley. I followed his Yahoo group for a while: http://tech.dir.groups.yahoo.com/neo/groups/QM_from_GR/info As you can imagine, its all slightly technical!-Here is his home page: http://www2.warwick.ac.uk/fac/sci/physics/staff/academic/mhadley/