Define quantum entanglement and explain its implications in quantum physics.

Quantum entanglement is a phenomenon in quantum mechanics where two or more particles become correlated in such a way that their properties, such as spin, position, or polarization, become interconnected and dependent on each other, even when they are physically separated by vast distances. In essence, entangled particles share a unique and non-classical connection that cannot be explained by classical physics. Key Aspects of Quantum Entanglement: 1. Entangled States: When particles become entangled, their quantum states are described as a combined or entangled state. The entangled state of a system cannot be described as a simple product of the states of individual particles. Instead, it is a complex combination that incorporates the correlations between them. 2. Spooky Action at a Distance: One of the most intriguing aspects of entanglement is that changes to one entangled particle instantaneously affect the state of the other, regardless of the distance separating them. This phenomenon was famously referred to by Albert Einstein as "spooky action at a distance." Implications in Quantum Physics: Q....