4.4 Article

Local spinfoam expansion in loop quantum cosmology

期刊

CLASSICAL AND QUANTUM GRAVITY
卷 28, 期 2, 页码 -

出版社

IOP Publishing Ltd
DOI: 10.1088/0264-9381/28/2/025003

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资金

  1. NSF [PHY0854743]
  2. George A and Margaret M Downsbrough Endowment
  3. Eberly research funds of Penn State
  4. Le Fonds Quebecois de la Recherche sur la Nature et les Technologies
  5. Edward A and Rosemary A Mebus funds
  6. Direct For Mathematical & Physical Scien
  7. Division Of Physics [854743] Funding Source: National Science Foundation

向作者/读者索取更多资源

The quantum dynamics of the flat Friedmann-Lemaitre-Robertson-Walker and Bianchi I models defined by loop quantum cosmology have recently been translated into a spinfoam-like formalism. The construction is facilitated by the presence of a massless scalar field which is used as an internal clock. The implicit integration over the matter variable leads to a nonlocal spinfoam amplitude. In this paper we consider a vacuum Bianchi I universe and show that by choosing an appropriate regulator a spinfoam expansion can be obtained without selecting a clock variable and that the resulting spinfoam amplitude is local.

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