Ultracold Atomic Gases in Optical Lattices:

This is just a monstrous volume of a review on the topic of ultracold atoms in optical traps. It has been published in Adv. Phys. v.56, p.243 (2007), but you can get a copy of it from arXiv.

Might be something you want to read before you go to bed. :)

Zz.