# A two measure model of dark energy and dark matter

## Abstract

In this work we construct a unified model of dark energy and dark matter. This is done with the following three elements: a gravitating scalar field, φ with a non-conventional kinetic term, as in the string theory tachyon; an arbitrary potential, V(φ); two measures — a metric measure ((−g){sup 1/2}) and a non-metric measure (Φ). The model has two interesting features: (i) For potentials which are unstable and would give rise to tachyonic scalar field, this model can stabilize the scalar field. (ii) The form of the dark energy and dark matter that results from this model is fairly insensitive to the exact form of the scalar field potential.

- Authors:

- Department of Physics, Ben-Gurion University, Beer-Sheva (Israel)
- Physics Department, California State University Fresno, Fresno, CA 93740 (United States)

- Publication Date:

- OSTI Identifier:
- 22279829

- Resource Type:
- Journal Article

- Journal Name:
- Journal of Cosmology and Astroparticle Physics

- Additional Journal Information:
- Journal Volume: 2012; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL MODELS; COSMOLOGY; METRICS; NONLUMINOUS MATTER; POTENTIALS; SCALAR FIELDS; STRING MODELS; STRING THEORY; TACHYONS; UNIFIED MODEL

### Citation Formats

```
Guendelman, Eduardo, Singleton, Douglas, and Yongram, N., E-mail: guendel@bgu.ac.il, E-mail: dougs@csufresno.edu, E-mail: nattapongy@nu.ac.th.
```*A two measure model of dark energy and dark matter*. United States: N. p., 2012.
Web. doi:10.1088/1475-7516/2012/11/044.

```
Guendelman, Eduardo, Singleton, Douglas, & Yongram, N., E-mail: guendel@bgu.ac.il, E-mail: dougs@csufresno.edu, E-mail: nattapongy@nu.ac.th.
```*A two measure model of dark energy and dark matter*. United States. doi:10.1088/1475-7516/2012/11/044.

```
Guendelman, Eduardo, Singleton, Douglas, and Yongram, N., E-mail: guendel@bgu.ac.il, E-mail: dougs@csufresno.edu, E-mail: nattapongy@nu.ac.th. Thu .
"A two measure model of dark energy and dark matter". United States. doi:10.1088/1475-7516/2012/11/044.
```

```
@article{osti_22279829,
```

title = {A two measure model of dark energy and dark matter},

author = {Guendelman, Eduardo and Singleton, Douglas and Yongram, N., E-mail: guendel@bgu.ac.il, E-mail: dougs@csufresno.edu, E-mail: nattapongy@nu.ac.th},

abstractNote = {In this work we construct a unified model of dark energy and dark matter. This is done with the following three elements: a gravitating scalar field, φ with a non-conventional kinetic term, as in the string theory tachyon; an arbitrary potential, V(φ); two measures — a metric measure ((−g){sup 1/2}) and a non-metric measure (Φ). The model has two interesting features: (i) For potentials which are unstable and would give rise to tachyonic scalar field, this model can stabilize the scalar field. (ii) The form of the dark energy and dark matter that results from this model is fairly insensitive to the exact form of the scalar field potential.},

doi = {10.1088/1475-7516/2012/11/044},

journal = {Journal of Cosmology and Astroparticle Physics},

issn = {1475-7516},

number = 11,

volume = 2012,

place = {United States},

year = {2012},

month = {11}

}

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