scholarly journals On power-counting renormalizability of Hořava gravity with detailed balance

2015 ◽  
Vol 91 (12) ◽  
Author(s):  
Daniele Vernieri
Keyword(s):  
Detailed Balance ◽  
Power Counting ◽  
Horava Gravity

scholarly journals Extended Hořava Gravity with Physical Ground-State Wavefunction

Symmetry ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 100
Author(s):  
Fu-Wen Shu ◽  
Tao Zhang
Keyword(s):  
Ground State ◽  
Detailed Balance ◽  
Vacuum State ◽  
Basic Structure ◽  
Power Counting ◽  
Physical Ground ◽  
Ground State Wavefunction ◽  
Realistic Theory ◽  
Horava Gravity ◽  
Extended Theories

We propose a new extended theory of Hořava gravity based on the following three conditions: (i) power-counting renormalizable, (ii) healthy IR behavior and (iii) a stable vacuum state in a quantized version of the theory. Compared with other extended theories, we stress that any realistic theory of gravity must have physical ground states when quantization is performed. To fulfill the three conditions, we softly break the detailed balance but keep its basic structure unchanged. It turns out that the new model constructed in this way can avoid the strong coupling problem and remains power-counting renormalizable, moreover, it has a stable vacuum state by an appropriate choice of parameters.

scholarly journals On Gauge Invariant Cosmological Perturbations in UV-modified Hořava Gravity: A Brief Introduction

2018 ◽  
Vol 168 ◽  
pp. 08003 ◽  
Author(s):  
Mu-In Park
Keyword(s):  
Detailed Balance ◽  
Big Bang ◽  
Matter Field ◽  
Cosmological Perturbations ◽  
Scale Invariant ◽  
Gauge Invariant ◽  
Four Dimensions ◽  
Detailed Balance Condition ◽  
Scalar Matter ◽  
Horava Gravity

We revisit gauge invariant cosmological perturbations in UV-modified, z = 3 Hořava gravity with one scalar matter field, which has been proposed as a renormalizable gravity theory without the ghost problem in four dimensions. We confirm that there is no extra graviton modes and general relativity is recovered in IR, which achieves the consistency of the model. From the UV-modification terms which break the detailed balance condition in UV, we obtain scale-invariant power spectrums for non-inflationary backgrounds, like the power-law expansions, without knowing the details of early expansion history of Universe. This could provide a new framework for the Big Bang cosmology.

scholarly journals PLANE SYMMETRIC SOLUTIONS IN HOŘAVA–LIFSHITZ THEORY

2010 ◽  
Vol 19 (13) ◽  
pp. 2079-2094 ◽  
Author(s):  
M. R. SETARE ◽  
D. MOMENI
Keyword(s):  
Physical Properties ◽  
Perfect Fluid ◽  
Detailed Balance ◽  
Static Case ◽  
Solvable Models ◽  
Plane Symmetric ◽  
Balance Principle ◽  
Static Solutions ◽  
Horava Gravity ◽  
Detailed Balance Principle

The purpose of this paper is to find and analyze plane symmetric, static (non-static) solutions in Hořava–Lifshitz gravity. We discussed two versions of Horava gravity. First we show that if the detailed balance principle is considered, there are both static and non-static solutions. We show that in the static case there are two families of solvable models, either one of them having a well-defined EoS, analogous to the perfect fluid solutions in GR. In the non-static case we find a family of solutions. Some physical properties of these solutions are discussed. Secondly we investigated the plane symmetric solutions for a new modified version of Hořava gravity, which has the new terms of action inserted into it.

scholarly journals Power counting renormalization of Hořava gravity at the kinetic conformal point

2017 ◽  
Vol 831 ◽  
pp. 012002 ◽  
Author(s):  
Jorge Bellorín ◽  
Alvaro Restuccia ◽  
Adrián Sotomayor
Keyword(s):  
Power Counting ◽  
Horava Gravity

Dielectronic Recombination in the Average-Atom Model

1988 ◽  
Vol 102 ◽  
pp. 215
Author(s):  
R.M. More ◽  
G.B. Zimmerman ◽  
Z. Zinamon
Keyword(s):  
Detailed Balance ◽  
Systematic Errors ◽  
Dielectronic Recombination ◽  
Rate Equations ◽  
Strong Correlations ◽  
Dense Plasmas ◽  
Atom Model ◽  
New Feature ◽  
Average Atom Model ◽  
Attachment Process

Autoionization and dielectronic attachment are usually omitted from rate equations for the non–LTE average–atom model, causing systematic errors in predicted ionization states and electronic populations for atoms in hot dense plasmas produced by laser irradiation of solid targets. We formulate a method by which dielectronic recombination can be included in average–atom calculations without conflict with the principle of detailed balance. The essential new feature in this extended average atom model is a treatment of strong correlations of electron populations induced by the dielectronic attachment process.

The Rotterdam Initiative in Reducing Waste Discharges at Source

1991 ◽  
Vol 24 (10) ◽  
pp. 171-177
Author(s):  
T. Vellinga ◽  
J. P. J. Nijssen
Keyword(s):  
Public Relations ◽  
Action Plan ◽  
Detailed Balance ◽  
River Rhine ◽  
The North ◽  
Complementary Role ◽  
Action Programme ◽  
The North Sea ◽  
Set Up

Much of the material dredged from the port of Rotterdam is contaminated to such a degree that it must be placed in specially constructed sites. The aim of Rotterdam is to ensure that the dredged material will once again be clean. This will entail the thorough cleansing of the sources of the contamination of the sediment in the harbours and in the River Rhine. The Rotterdam Rhine Research Project (RRP) is one of the means to achieve this based on: technical research, legal research, public relations and dialogues with dischargers. The programme for five selected heavy metals is almost complete. For many heavy metal discharge points between Rotterdam and Rheinfelden, a specially devised independent load assessment has been carried out four times. Balance studies were used to determine the relative contributions of the point discharges to the total. Currently the results are being used in an attempt to negotiate agreements with a selected number of the major dischargers. At present, more detailed balance studies are being set up and exploratory measurements carried out for organic micropollutants. It may be concluded that the research is progressing successfully and methods and techniques developed seem satisfactory and broadly applicable. The Rhine Action Programme encompasses an international effort to improve the quality of the Rhine water. Although the RRP plays a modest complementary role to the Rhine Action Plan, there is no doubt of the value of this Rotterdam initiative. The mode of work followed in the RRP contains elements that can be of use in combatting the contamination of the North Sea by rivers other than the Rhine.

Sign in / Sign up

Export Citation Format

Share Document