Quantum entanglement can indeed have a wider role beyond the connectivity between individual particles. It is a property of quantum systems, and these systems can include not only individual particles but also collections of particles, such as atoms, molecules, or even larger objects.
The concept of entanglement becomes particularly interesting when considering systems with a large number of particles, where entanglement can exist between different parts of the system. In such cases, the entanglement can give rise to emergent phenomena and correlations that are not present in classical systems.
Entanglement also has implications for our understanding of the entire universe. One area where it is being actively studied is in the context of quantum cosmology, which explores the application of quantum mechanics to the origin and behavior of the universe as a whole. The study of entanglement in cosmology seeks to understand how entangled quantum states could have played a role in the early universe, potentially influencing the formation of structures and the evolution of cosmic phenomena.
Furthermore, entanglement has connections to fundamental principles in physics, such as the holographic principle and the AdS/CFT correspondence. These ideas suggest that the information and properties of a system can be encoded on its boundary or in a lower-dimensional description. Entanglement plays a crucial role in these theoretical frameworks, linking the behavior of quantum systems to their holographic descriptions and shedding light on the deep connections between quantum mechanics and gravity.
In summary, while entanglement initially arose as a concept to describe correlations between individual particles, its significance extends to larger systems, including the universe as a whole. Its role in understanding complex quantum systems and its connections to fundamental principles of physics make it a subject of ongoing research and exploration.