Quantum Field Theory (QFT) is a cornerstone of modern physics, providing a framework to understand the universe at its most fundamental level. It merges quantum mechanics, which explains the behaviors of extremely small particles, with special relativity, which explains the behaviors of objects moving at high speeds. QFT not only describes how particles interact with each other but also reveals that the universe is filled with dynamic fields that give rise to the particles we observe.

Quantum entanglement describes a special connection between two or more particles where the state of one particle is directly connected to the others, no matter how far apart they are. This idea was first thought of in the 1930s by Albert Einstein, Boris Podolsky, and Nathan Rosen.

Quantum batteries are a new way to store energy. They could be a great replacement for lithium batteries. They use quantum mechanics instead of normal physics. They are not quite reading and scientists are still working out the little problems, but if they are perfected, they could be amazing.