Local Hidden Variable Theories
Local Hidden Variable Theories are interpretations of quantum mechanics that propose the existence of underlying, unobservable variables to explain quantum phenomena deterministically, while adhering to the principle of locality (no faster-than-light influences). They aim to resolve apparent quantum randomness and non-locality by suggesting that particles have pre-determined properties, with quantum probabilities arising from ignorance of these hidden variables. This contrasts with standard quantum mechanics, which treats quantum states as fundamentally probabilistic and allows for non-local correlations like entanglement.
Developers should learn about Local Hidden Variable Theories when working in quantum computing, quantum information theory, or foundational physics, as they provide historical and conceptual context for understanding quantum mechanics' interpretational challenges. Knowledge of these theories is crucial for grasping Bell's theorem and quantum non-locality, which underpin quantum cryptography and quantum communication protocols. It helps in evaluating alternative models to standard quantum mechanics, though most have been experimentally disfavored by Bell test violations.