Barbero immirzi parameter

21 Sep 2012 It facilitates the loop quantization programme and subsequently the BarberoImmirzi parameter (gamma) arises in both the spectra of. 13 Jun 2013 the role of the Barbero-Immirzi parameter $\gamma$ and the choice of connection in the construction of (a symmetry-reduced version of) loop. 15 May 2015 Barbero-Immirzi parameter has been debated intensively. [4–17]. BF theory, and the Barbero-Immirzi parameter completely disappears.

A four-fermion coupling, which emerges from the Holst action and is related to the Barbero-. Immirzi (BI) parameter. This gravitational action is an important. 3 Mar 2009 Motivations: The Barbero–Immirzi (BI) parameter is a free constant parameter to be a field rather than a constant, digressing on the dynamics.

It has been shown that Sakharov.s induced, from the fields entering the standard model, Barbero–Immirzi parameter assumes, in the framework of Euclidean. 30 Jun 2014 This led to a spin-foam model valid for the Barbero-Immirzi parameter belonging to the interval 1 ? 1 which is a promising candidate for a.

Testing the role of the Barbero-Immirzi parameter

Chapter 2. Topological interpretation of. Barbero-Immirzi parameter. It is wellknown that Einstein.s General Theory of Relativity can be described as a gauge. The Barbero–Immirzi parameter appears in the real connection formulation of gravity in terms of the Ashtekar variables, and gives rise to a one-parameter.

On the role of the Barbero--Immirzi parameter in

15 Dec 2006 The Barbero–Immirzi ambiguity is shown to occur only if the conformal. It is called the Barbero–Immirzi parameter and will result in a. 14 May 2012 This factor, known as the Barbero-Immirzi parameter, enters the theory through the quantization condition and then has to be fixed to match the. Massless Dirac fields and Barbero-Immirzi parameter in Cosmology http://www. sbf1.sbfisica.org.br/eventos/enf/2011/sys/resumos/A1487-1.pdf.

15 May 2012 In particular, the entropy of the black hole should depend on the Barbero-Immirzi parameter but Bianchi derives that it doesn.t. So one gets two. 18 Apr 2013 On the role of the Barbero–Immirzi parameter in discrete quantum gravity. View the table of contents for this issue, or go to the journal.

We consider gravity in 2+1 spacetime dimensions, with a negative cosmological constant and a.Barbero–Immirzi. (B-I)-like parameter, when the spacetime.

New;phase; of quantum gravity, Philosophical Transactions

Barbero-Immirzi parameter Relevance at the quantum level Vacuum How classical geometry emerges from LQG IHES - november 2013. Karim NOUI. Ashtekar-Barbero variables imaginary (Ashtekar) or real (Barbero) to avoid reality condition. • Drastic. Testing the role of the Barbero-Immirzi parameter and. A general argument provides the motivation to consider the Barbero-Immirzi parameter as a field. The specific form of the geometrical effective action allows one.