In a hypothetical universe made up of a single fundamental particle, the concepts of time and space may differ significantly from our familiar notions. It is challenging to envision such a scenario as our current understanding of the universe is based on a more complex and diverse structure.
However, let's explore a simplified perspective. In this scenario, where a single particle constitutes the entire universe, the particle itself might be the only reference point for measuring time and space. The behavior of this particle, such as its oscillations or interactions, could potentially serve as a basis for defining intervals of time or distances.
For instance, you could measure time based on the period or frequency of the particle's oscillations. By observing the particle's repeated behavior, you might establish a notion of time units or intervals. Similarly, you could use the particle's motion or displacement to define units of space or distance.
However, it's important to recognize that this simplistic viewpoint disregards the complexities of our current universe, where space and time have a more intricate interplay. In reality, our understanding of time and space is intertwined with the fabric of spacetime, and it involves a multitude of particles, fields, and interactions.
In a universe consisting of a single fundamental particle, the nature of time and space would likely be vastly different and perhaps difficult to conceptualize within our current understanding. It highlights the importance of considering the broader context of our universe's structure and the interactions of various constituents when discussing the measurement of time and space.