The concept of entanglement in quantum mechanics can be puzzling and can challenge our classical understanding of space and time. However, it's important to note that entanglement does not imply that space and time are illusions.
Entanglement is a phenomenon where two or more particles become correlated in such a way that the state of one particle is dependent on the state of the others, regardless of the distance between them. When two entangled particles are measured, their properties become correlated instantaneously, even if they are separated by vast distances. This phenomenon has been experimentally observed and is a well-established feature of quantum mechanics.
However, it is crucial to understand that this instantaneous correlation does not allow for the transfer of information in a classical sense. While the measurement of one particle can instantaneously affect the state of the other particle, it does not provide a means for transmitting information faster than the speed of light. This is due to the fact that the measurement outcomes appear random and cannot be influenced or controlled to transmit information.
Regarding space and time, they are fundamental aspects of our physical reality. They are not considered illusions but rather integral components of our understanding of the universe. While entanglement challenges our classical intuitions about the way objects interact and exchange information, it doesn't negate the existence or significance of space and time.
It's worth noting that there are ongoing debates and research at the intersection of quantum mechanics and theories of space and time, such as quantum gravity, which aim to reconcile these fundamental aspects of our reality. However, there is no widely accepted theory that completely explains the nature of space, time, and entanglement in a unified framework.