Open AccessParameter Constrain of Nonminimal Derivative Coupling of Scalar Field Using Strong Energy Condition
Author(s) -
M. R. Taufani,
Agus Suroso,
Freddy P. Zen
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1245/1/012071
Subject(s) - physics , scalar field , coupling parameter , coupling constant , scalar (mathematics) , coupling (piping) , energy condition , mathematical physics , constant (computer programming) , gravitation , perfect fluid , einstein , scale factor (cosmology) , hubble's law , field (mathematics) , classical mechanics , quantum mechanics , dark energy , general relativity , mathematics , cosmology , geometry , mechanical engineering , metric expansion of space , computer science , pure mathematics , engineering , programming language
The study aims to determine the constrain of the coupling parameter/ xi of nonminimal derivative coupling theory (NMDC) of scalar field. The calculation of the parameter was build from the strong energy conditions combined to modified Einstein theory(i.e. the scalar filed act as the external source of gravity beside the ideal fluid). The violation of strong energy condition (SEC) indicate the atrracting gravity phenomenon. Then one can expecting two equations that consist of of energy density ρ and the momentum p , then one defined the deacceleration q to these equation. The present value of cosmological constant such as Hubble constant H , q , and scale factor a need to be put into the equations to determine the boundaries of the strong energ. The results show the coupling parameter must be ξ ≥ 1.2 × 10 34 s 2 for the SEC to be valid in the theory.