File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

A MINIMAL MODEL OF LORENTZ GAUGE GRAVITY WITH DYNAMICAL TORSION

Author(s)
Cho, YongminPak, D. G.Park, B. S.
Issued Date
2010-06
DOI
10.1142/S0217751X10048524
URI
https://scholarworks.unist.ac.kr/handle/201301/3041
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77953500078
Citation
INTERNATIONAL JOURNAL OF MODERN PHYSICS A, v.25, no.14, pp.2867 - 2882
Abstract
A new Lorentz gauge gravity model with R(2)-type Lagrangian is proposed. In the absence of classical torsion, the model admits a topological phase with an arbitrary metric. We analyze the equations of motion in constant curvature space-time background using the Lagrange formalism and demonstrate that the model possesses a minimal set of dynamic degrees of freedom for the torsion. Surprisingly, the number of torsion dynamic degrees of freedom equals the number of physical degrees of freedom for the metric tensor. An interesting feature of the model is that the spin-2 mode of torsion becomes dynamical essentially due to the nonlinear structure of the theory. We perform covariant one-loop quantization of the model for a special case of constant curvature space-time background. We treat the contortion as a quantum field variable where as the metric tensor is kept as a classical object. We discuss a possible mechanism of an emergent Einstein gravity as a part of the effective theory induced due to quantum dynamics of torsion.
Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
ISSN
0217-751X

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.