Talk:Spin foam

1993 paper
It should be noted that the concept of a spin foam, although not called that, was introduced in the paper "A Step Toward Pregeometry I: Ponzano-Regge Spin Networks and the Origin of Spacetime Structure in Four Dimensions" by Norman J. LaFave (GR-QC 9310036) (1993). In this paper, the concept of creating sandwiches of 4-geometry (and local time scale) from spin networks is described, along with the connection of these spin geometries to form a generalized Feynman path integral connecting the structures between two spin network boundaries. This paper goes beyond much of the later work by showing how 4-geometry is already present in the seemingly three dimensional spin networks. —Preceding unsigned comment added by Dr. LaFave (talk • contribs) 16:58, 16 July 2009 (UTC)

Contextual note:
My previous contribution to this page was removed with a note that it wasn't peer reviewed and was not a correct description of spin foams. Although the paper was not published in a journal at the time due to the start of a nw career path, it was reviewed by several researchers in the field and aspects of the paper have appeared in books and papers from other authors since then. Furthermore, although the description differs somewhat in notation and focus from current papers, it is a correct description of a spin foam and conforms to the description given here and in several published papers. Finally, this paper contains "new" properties that advance the field. We are currently working to publish the paper in a journal. —Preceding unsigned comment added by 98.200.93.78 (talk) 23:21, 30 August 2009 (UTC)


 * It's been two years, so may we get an update? Has this gone to a journal yet? –  Paine Ellsworth  (  C LIMAX   )  10:54, 6 October 2011 (UTC)


 * The comment on the 1993 paper reappeared and today I have removed: not only the paper is not peer reviewed, but it is not even available on the arXiv. – Kecchina   17:26, 2 June 2012 (UTC)

The work was done in collaboration with Warner Miller and John Archibald Wheeler. Several people have managed to extract it from ArXiv despite the previous comment. Work has been done recently and we hope to have a new paper in June submitted for publication. As I said, it is a correct description that predates current descriptions and many have been using information from this paper and my dissertation in the current books and papers without proper attribution. — Preceding unsigned comment added by 108.70.53.184 (talk) 05:20, 23 December 2013 (UTC)

Let's improve the understandability of the intro for lay folks
We have been greatly advancing our mission statement by vastly improving the introductions so they are lay friendly for even very technical articles. We understand Spin Foam to be such a technical topic, but ... will someone improve the intro please. No need to begin with sentences containing so many terms which need to be looked up by any lay person, even those who are involved enough to be reading about Spin Foam. THX

Naturally occurring brief partial entanglements
Brief partial entanglements (lasting almost for zero seconds, but the difference-imbalance of their duration among space areas is important for gravity, not their duration) occur naturally in nature among particles and virtual particles and their statistics affect gravity. — Preceding unsigned comment added by 2A02:587:4108:B200:B09E:4B69:15EF:B358 (talk) 01:23, 19 May 2016 (UTC)