Local Hidden Variable theories attempt to preserve the tenets of classical physics by suggesting that hidden or unmeasurable variables account for quantum correlations between particles, without violating the principle of locality. However, Bell's Theorem and subsequent experiments have shown that no local hidden variable model can fully account for the observed phenomena, challenging the classical worldview and suggesting that quantum entanglement results in non-local correlations.

Local Hidden Variables

Local Hidden Variable theories

Classical physics encompasses the principles and theories developed before the advent of quantum mechanics and relativity, primarily focusing on macroscopic phenomena. It includes foundational laws and concepts that describe the motion of bodies, forces, energy, and the properties of matter and waves in a deterministic framework.

classical physics

Hidden Variables

unmeasurable variables

Quantum correlations describe the non-classical relationships between quantum systems, where the state of one system instantaneously influences the state of another, regardless of distance. These phenomena challenge classical intuitions and are central to quantum mechanics, playing a crucial role in technologies like quantum computing and quantum cryptography.

quantum correlations

principle of locality

Bell's Theorem demonstrates that no physical theory of local hidden variables can ever reproduce all the predictions of quantum mechanics, implying that the quantum world is fundamentally non-local. This theorem challenges classical intuitions about separability and locality, suggesting that entangled particles remain connected regardless of the distance between them.

Bell's Theorem

local hidden variable model

observed phenomena

classical worldview

Quantum entanglement is a phenomenon where particles become interconnected in such a way that the state of one particle instantaneously influences the state of another, regardless of the distance between them. This non-local interaction challenges classical intuitions about separability and locality, and is a cornerstone of quantum mechanics with implications for quantum computing and cryptography.

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