## 58 Citations

### Quintessence model and observational constraints

- Physics
- 2002

Recent observations of type Ia supernovae strongly support the view that the universe is accelerating now and decelerated in the recent past. By assuming a general relation between the quintessence…

### Coupled quintessence with double exponential potentials

- Physics
- 2014

We study flat Friedmann-Robertson-Walker (FRW) models with a perfect fluid matter source and a scalar field non minimally coupled to matter having a double exponential potential. It is shown that the…

### Acceleration of the universe with a simple trigonometric potential

- Physics
- 2005

In this paper, we investigate the quintessence model with a minimally coupled scalar field in the context of recent supernovae observations. By choosing a particular form of the deceleration…

### On quintessential cosmological models and exponential potentials

- Physics
- 2012

We first study dark energy models with a minimally-coupled scalar field and generalized exponential potentials, admitting exact solutions for the cosmological equations: actually, it turns out that…

### A reconstruction of quintessence dark energy

- Physics
- 2015

With a parametric form of the equation of state parameter of dark energy, a quintessence potential has been reconstructed. The potential is found to be a generalization of a double exponential…

### Dynamics of quintessence models of dark energy with exponential coupling to dark matter

- Physics
- 2006

We explore quintessence models of dark energy which exhibit non-minimal coupling between the dark matter and dark energy components of the cosmic fluid. The kind of coupling chosen is inspired by…

### Transient accelerating scalar models with exponential potentials

- Physics
- 2013

We study a known class of scalar dark energy models in which the potential has an exponential term and the current accelerating era is transient. We find that, although a decelerating era will return…

### Coupled quintessence and vacuum decay

- Physics
- 2008

We discuss observational consequences of a class of cosmological models characterized by the dilution of pressureless matter attenuated with respect to the usual a{sup -3} scaling due to the decay of…

### A new parametrization of dark energy equation of state leading to double exponential potential

- PhysicsResearch in Astronomy and Astrophysics
- 2018

We show that a phenomenological form of energy density for the scalar field can provide the required transition from decelerated (q > 0) to accelerated expansion (q < 0) phase of the universe. We…

### Stability analysis in tachyonic potential chameleon cosmology

- Physics
- 2011

We study general properties of attractors for tachyonic potential chameleon scalar-field model which possess cosmological scaling solutions. An analytic formulation is given to obtain fixed points…

## References

SHOWING 1-10 OF 45 REFERENCES

### Quintessence, the gravitational constant, and gravity

- Physics, Geology
- 1999

Dynamical vacuum energy or quintessence, a slowly varying and spatially inhomogeneous component of the energy density with negative pressure, is currently consistent with the observational data. One…

### Nonminimal coupling and quintessence

- Physics
- 2000

Recent studies of type Ia supernovas with redshifts up to about $z\ensuremath{\lesssim}1$ reveal evidence for a cosmic acceleration in the expansion of the Universe. The most straightforward…

### New cosmological model of quintessence and dark matter

- Physics
- 2000

We propose a new class of quintessence models in which late times oscillations of a scalar field give rise to an effective equation of state which can be negative and hence drive the observed…

### Compactification, Vacuum Energy and Quintessence

- Physics
- 1999

We study the possibility that the vacuum energydensity of scalar and internal-space gauge fieldsarising from the process of dimensional reduction ofhigher dimensional gravity theories plays the role…

### Extended quintessence

- PhysicsPhysical Review D
- 1999

We study Quintessence cosmologies in the context of scalar-tensor theories of gravity, where a scalar ﬁeld φ , assumed to provide most of the cosmic energy density today, is non-minimally coupled to…

### Quintessence arising from exponential potentials

- Mathematics
- 2000

We demonstrate how the properties of the attractor solutions of exponential potentials can lead to models of quintessence with the currently observationally favored equation of state. Moreover, we…

### Quintessence, cosmic coincidence, and the cosmological constant

- Physics
- 1999

Recent observations suggest that a large fraction of the energy density of the Universe has negative pressure. One explanation is vacuum energy density; another is quintessence in the form of a…

### Tracker fields from nonminimally coupled theory

- Mathematics
- 2000

We extend the concept of quintessence to a flat nonminimally coupled scalar - tensor theories of gravity. By means of Noether's symmetries for the cosmological pointlike Lagrangian L, it is possible…

### Cosmology in scalar tensor theory and asymptotically de Sitter universe

- Physics
- 2001

We have investigated the cosmological scenarios with a four-dimensional effective action which is connected with multidimensional, supergravity and string theories. The solution for the scale factor…

### Axion and Almost Massless Quark as Ingredients of Quintessence

- Physics
- 1998

It is pointed out that a natural introduction of quintessence is an axion with an almost massless quark. With an appropriate gauge or discrete symmetry, one can obtain the quintessence potential…