In classical physics, space is generally considered as a vacuum, devoid of any substance or material. However, in the context of quantum physics, the nature of space becomes more intricate.
According to quantum field theory, which combines quantum mechanics and special relativity, space is not considered empty but is described as permeated by quantum fields. These fields are fundamental entities that exist throughout space and are associated with different types of particles, such as electrons, photons, and quarks.
In quantum field theory, particles are viewed as excitations or fluctuations in their respective quantum fields. These fields extend throughout space and interact with one another. The properties and behavior of particles, as well as their interactions, are described by the mathematics of quantum field theory.
It is important to note that in quantum field theory, space itself is not made of particles or matter in the traditional sense. Rather, it is the quantum fields that permeate space and give rise to the particles and their interactions.
It's worth mentioning that our understanding of the nature of space at the most fundamental level is an ongoing area of research and remains an active topic of investigation in theoretical physics. Scientists continue to explore and refine our understanding of the quantum nature of space and its implications.