Entangled states are a special kind of quantum state where two or more particles become linked in such a way that the state of one particle cannot be described independently of the state of the other(s). This non-classical relationship means that measuring one particle instantly influences the other, no matter the distance between them. Entangled states are foundational for many quantum technologies and play a crucial role in algorithms that leverage quantum parallelism, like the quantum phase estimation algorithm.
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