Models of non-relativistic quantum gravity: the good, the bad and the healthy

被引：275

作者：

Blas, D. ^{[1
]}

Pujolas, O. ^{[2
,3
,4
]}

Sibiryakov, S. ^{[1
,5
]}

机构：

[1] Ecole Polytech Fed Lausanne, FSB ITP LPPC, CH-1015 Lausanne, Switzerland

[2] CERN, Div Theory, CH-1211 Geneva 23, Switzerland

[3] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain

[4] Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain

[5] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2011年 / 04期

关键词：

Space-Time Symmetries; Renormalization Group; Models of Quantum Gravity; LORENTZ VIOLATION;

D O I：

10.1007/JHEP04(2011)018

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Horava's proposal for non-relativistic quantum gravity introduces a preferred time foliation of space-time which violates the local Lorentz invariance. The foliation is encoded in a dynamical scalar field which we call 'khronon'. The dynamics of the khronon field is sensitive to the symmetries and other details of the particular implementations of the proposal. In this paper we examine several consistency issues present in three non-relativistic gravity theories: Horava's projectable theory, the healthy non-projectable extension, and a new extension related to ghost condensation. We find that the only model which is free from instabilities and strong coupling is the non-projectable one. We elaborate on the phenomenology of the latter model including a discussion of the couplings of the khronon to matter. In particular, we obtain the parameters of the post-Newtonian expansion in this model and show that they are compatible with current observations.

引用

页数：53

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