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Tracing the Evolution of Quantum Entanglement from Einstein to Bell

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The History of Entanglement: From Einstein to Bell Entanglement, one of the most fascinating and mysterious phenomena in the quantum world, was first introduced by Albert Einstein, Boris Podolsky, and Nathan Rosen in 1935. The theory of entanglement describes how two particles can become intertwined in such a way that the state of one particle is immediately reflected in the state of the other, regardless of how far apart they are. In the decades that followed, physicists continued to study entanglement, and in 1964, John Bell proposed a way to test whether entanglement was a real phenomenon. Bell's theorem showed that entanglement could not be explained by classical physics and that the phenomenon was indeed a fundamental aspect of the quantum world. Despite the mounting evidence for entanglement, it wasn't until the 1980s and 1990s that researchers began to explore its potential for practical applications. In particular, scientists discovered that entangled particles could be