Ghost Dark Energy with Variable Gravitational Constant



Cosmology, dark energy, dark matter, hubble parameter


In a bid to resolve lingering problems in modern Cosmology, Cosmologist are turning to models in which Physical constants of nature are not real constants but vary as function of the scale factor of the universe. In this work, a cosmological model is developed by incorporating Ghost Dark Energy model with Barrow's ansatz for varying Gravitational Constant. A model obtained is free from initial Big Bang Singularity and Inflation Problem. A test of Causality showed that the model depends of the constant m and is classically stable at  -6 > m > -3.


Download data is not yet available.


D. Overbye, “One cosmic question, too many answers,” New York Times, pp. 2–9, 2003.

P. J. E. Peebles and B. Ratra, “The cosmological constant and dark energy,” Rev. Mod. Phys., vol. 75, no. 2, p. 559, 2003.

D. H. Weinberg, R. Dave, N. Katz, and J. A. Kollmeier, “The Lyman?? Forest as a Cosmological Tool,” in AIP Conference Proceedings, 2003, vol. 666, no. 1, pp. 157–169.

R. A. Copeland, D. L. Pompliano, and T. D. Meek, “Drug–target residence time and its implications for lead optimization,” Nat. Rev. Drug Discov., vol. 5, no. 9, pp. 730–739, 2006.

E. Curiel, “Singularities and black holes,” 2009.

P. J. Steinhardt, L. Wang, and I. Zlatev, “Cosmological tracking solutions,” Phys. Rev. D, vol. 59, no. 12, p. 123504, 1999.

S. Capozziello, V. F. Cardone, S. Carloni, and A. Troisi, “Curvature quintessence matched with observational data,” Int. J. Mod. Phys. D, vol. 12, no. 10, pp. 1969–1982, 2003.

F. R. Urban and A. R. Zhitnitsky, “Cosmological constant from the ghost: a toy model,” Phys. Rev. D, vol. 80, no. 6, p. 63001, 2009.

E. Witten, “Cosmic separation of phases,” Phys. Rev. D, vol. 30, no. 2, p. 272, 1984.

C. Beisbart, “Can we justifiably assume the cosmological principle in order to break model underdetermination in cosmology?,” J. Gen. Philos. Sci., vol. 40, no. 2, pp. 175–205, 2009.

K. Kawarabayashi and N. Ohta, “On the partical conservation of the U (1) current,” Prog. Theor. Phys., vol. 66, no. 5, pp. 1789–1802, 1981.

A. K. Singha and U. Debnath, “Varying speed of light, modified Chaplygin gas and accelerating universe,” Int. J. Mod. Phys. D, vol. 16, no. 01, pp. 117–122, 2007.

L. Kantha, “A time-dependent and cosmological model consistent with cosmological constraints,” Adv. Astron., vol. 2016, 2016.

S. Nesseris and L. Perivolaropoulos, “Evolving Newton’s constant, extended gravity theories, and SnIa data analysis,” Phys. Rev. D, vol. 73, no. 10, p. 103511, 2006.

R. Dungan and H. B. Prosper, “Varying-G cosmology with type Ia supernovae,” Am. J. Phys., vol. 79, no. 1, pp. 57–62, 2011.

B. Borah and M. Ansari, “Holographic Dark Energy Model with Time Varying G, as well as c 2 Parameter,” Int. J. Theor. Phys., vol. 53, no. 4, pp. 1217–1224, 2014.

article IJEAP : Ghost Dark Energy with Variable Gravitational Constant



How to Cite

G. Joseph, “Ghost Dark Energy with Variable Gravitational Constant”, International Journal of Engineering and Applied Physics, vol. 2, no. 2, pp. 466–471, May 2022.