A Possible Origin of Dark Energy

Details A Possible Origin of Dark Energy A Possible Origin of Dark Energy

2004-04-30

arxiv.org/abs/astro-ph/0404601v3

Chin.Phys.Lett. 21 (2004) 1187-1188

Astronomy and Astrophysics

Astrophysics

4 pages, no figure, typos corrected

Scientific paper

10.1088/0256-307X/21/6/058

We discuss the possibility that the existence of dark energy may be due to the presence of a spin zero field $\phi(x)$, either elementary or composite. In the presence of other matter field, the transformation $\phi(x)\to \phi(x) +$ constant can generate a negative pressure, like the cosmological constant. In this picture, our universe can be thought as a very large bag, similar to the much smaller MIT bag model for a single nucleon.

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