Did the dark energy always have a large Compton wavelength?

Details Did the dark energy always have a large Compton wavelength? Did the dark energy always have a large Compton wavelength?

2002-10-29

arxiv.org/abs/astro-ph/0210640v2

Astronomy and Astrophysics

Astrophysics

5 pages, 3 colour eps figures. Related to a talk given by BB at the XVIIIth IAP Colloquium "On the nature of Dark Energy", Par

Scientific paper

Until now all well-studied dark energy models proposed have very large Compton wavelengths, $\lambda_c > 100 Mpc$ at all time and hence show no clustering on small scales. Evidence against this would disfavour both $\Lambda$CDM and quintessence. We show however, that large $\lambda_c$ is actually favoured by current CMB, LSS and SN1a data by comparing quintessence with a condensate scenario with the same background dynamics. The condensate scenario has a very small $\lambda_c$ before making a transition to negative pressure and large $\lambda_c$ and therefore exhibits a rich CMB phenomenology which roughly interpolates between $\Lambda$CDM and flat CDM models.

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