Try reading http://arxiv.org/pdf/0903.2211.pdf http://arxiv.org/pdf/0903.2211.pdf This basically presents many worlds as a mass density obtained by integrating

Try reading http://arxiv.org/pdf/0903.2211.pdf http://arxiv.org/pdf/0903.2211.pdf This basically presents many worlds as a mass density obtained by integrating out the wave function. The worlds we see can be traced through the evolution, like two videos overlain on each other can be deduced over time.