# DeSitter and AntiDeSitter Universe

1. May 29, 2014

### Quantizer

If the DeSitter Universe is modelled by Empty Universe
1. Very Early Universe with Inflaton Field
2. Very Far Universe in Future when Black Holes have evaporated

Last edited: May 29, 2014
2. May 29, 2014

### Quantizer

Q1
What Einstein model currently describes a Homogeneous and Isotropic approximated Universe with Matter with positive Lambda, is it still Friedmann (FLRW) or have models moved on

Which Einstein model describes an Inhomogeneous and Anisotropic very early universe with primordial density fluctuations

Last edited: May 29, 2014
3. May 29, 2014

### Quantizer

Q2

Are there any scenarios for an AntiDeSitter Model in the chronology of the Universe

4. May 30, 2014

### Mordred

Its still the FLRW metric or more specifically the LCDM model, $\Lambda$CDM. Which also involves the Eintein field equations..
as far as the De-sitter universe usages you will probably be interested in this article.

De-Sitter musings

http://arxiv.org/abs/1205.3855

also a string theory model variant uses ADS.
ADS/CFT Anti-Desitter correspondance I'm not too familiar with how this model works yet to supply any details.

5. May 31, 2014

### Quantizer

Thanks for that Mordred, a few pages in and already intrigued by some of the astronomical exponentials being put forward