  In this paper we will analyse the creation of the multiverse. We will first
calculate the wave function for the multiverse using third quantization. Then
we will fourth quantize this theory. We will show that there is no single
vacuum state for this theory. Thus, we can end up with a multiverse, even after
starting from a vacuum state. This will be used as a possible explanation for
the creation of the multiverse. We also analyse the effect of interactions in
this fourth quantized theory.
