Exploring the Multiverse: Parallel Past and Future Universes

The concept of the multiverse has long fascinated both scientists and thought explorers. Among the many interesting ideas, the idea of parallel universes that are set in the past or the future poses intriguing questions. Let's delve into these fascinating concepts and how they fit within the framework of quantum mechanics and modern theories of the multiverse.

Parallel Universes: Past and Future

When we talk about parallel universes, we often imagine a parallel universe that is younger than our current one, which means it is set in the past, or an older one that is set in the future. However, the framework of the multiverse suggests that all of time and all probable pasts, presents, and futures exist simultaneously, each in its own temporal location. Consciousness perceives time by focusing on the present moment, which is chosen from a myriad of probable futures.

The key idea here is that all of time is relative. Consciousness perceives time much like experiencing different cities in the world; they all exist and are happening right now. The only difference is the separation is temporal rather than physical, much like the distance between different cities is based on geography.

MCU Multiverse and Temporal Synchronization

When we consider the Multiverse in the context of the Marvel Cinematic Universe (MCU), the concept becomes even more intriguing. In the MCU, the realities of the universes are physically diverse, ranging from worlds that are virtually indistinguishable to those that are drastically different. Despite these physical differences, these universes share a common temporal synchronization because they are manifestations of different features of existence.

From a theoretical standpoint, our universe starts at the Big Bang. However, multiverse theories do not provide a clear definition for what "before" means, nor do they specify how or if time is defined in the 'space' from which these universes arise. This vagueness leaves room for diverse interpretations and theoretical models.

Cherry Picking and the Multiverse Framework

Your question about parallel universes that are set in the past or future raises an important point. In the broader context of the multiverse theory, all time exists simultaneously. Therefore, the traditional use of terms like "older" and "younger" to describe universes across different timelines can be problematic. Once you're in a particular universe, that universe's timeline is the only 'current' timeline for you.

It's crucial to consider the entire multiverse theory rather than cherry-picking aspects to form a different framework. The multiverse is a complex phenomenon that requires a holistic understanding of both the physical and temporal aspects of existence.

Lastly, the concept of a frame, where relative motion is not observed, is relevant. Within any given frame, you can use the terms "older" and "younger" to describe events. However, across different frames, the uniqueness of ordering events can be ambiguous, especially when comparing events in different universes based on their relative motion.

In summary, the idea of parallel past and future universes is a fascinating exploration within the framework of the multiverse. While it raises many intriguing questions, the multiverse theory strongly suggests that all these universes coexist, and the time-axis is a relative concept that does not allow definitive ordering of events across different universes.