The nature of spacetime, whether it is emergent or fundamental, is a topic of ongoing scientific research and theoretical speculation. There is no definitive consensus among physicists at the moment, and different approaches and theories propose different perspectives.
In the framework of general relativity, spacetime is considered fundamental. According to Einstein's theory, spacetime is a four-dimensional geometric structure that is curved by the presence of matter and energy. It forms the fabric of the universe and provides a stage on which the dynamics of particles and fields unfold.
However, in certain approaches to quantum gravity and attempts to unify general relativity with quantum mechanics, there are suggestions that spacetime could be emergent. Some speculative ideas, such as string theory or loop quantum gravity, propose that spacetime might be composed of more fundamental entities or entities that emerge from underlying quantum processes. In these theories, spacetime may not be fundamental but rather an approximate description arising from more fundamental building blocks or entangled microscopic degrees of freedom.
It is important to note that these ideas are still highly theoretical and speculative, and there is currently no experimental evidence to definitively support or rule out either the fundamental or emergent nature of spacetime. The search for a complete theory of quantum gravity and a better understanding of the nature of spacetime are active areas of research in theoretical physics.