The concept of the multiverse refers to the hypothetical existence of multiple universes or realms beyond our own observable universe. It suggests that our universe might be just one among many, each potentially having different physical laws, properties, or even dimensions.
When discussing the multiverse, it's important to distinguish between different interpretations and hypotheses. One specific interpretation of the multiverse is known as the Level I Multiverse, which suggests that multiple universes exist as separate, disconnected regions of space-time. In this interpretation, each universe would have its own set of physical laws and properties.
Now, if we consider this Level I Multiverse, it is conceivable that each of these separate universes could also have further subdivisions or regions with their own unique characteristics. This idea could be seen as a "multiverse within the multiverse." However, it's important to note that this notion is purely speculative, and there is no empirical evidence or widely accepted scientific theory that directly supports the existence of such nested multiverses.
It's also worth mentioning that there are other interpretations of the multiverse, such as the Level II Multiverse, which suggests the existence of multiple "bubble" universes that form as a result of cosmic inflation. In this interpretation, the idea of nested multiverses is not typically considered.
Ultimately, the concept of a multiverse having a multiverse is a speculative notion within the realm of theoretical physics. While it is an intriguing idea, it remains largely theoretical and hypothetical, with ongoing scientific investigations and discussions aiming to explore the nature of our own universe and its potential connections to any broader multiverse.