What is a Qubit?

A Reddit user questioned the practical reality of qubits, challenging whether superposition is a physical phenomenon or merely a theoretical concept in quantum computing. The post explores skepticism about quantum mechanics, particularly hidden variable theories, which suggest superposition reflects probability rather than particles existing in multiple states simultaneously. Hardware implementation remains unclear to the user, who seeks concrete examples of how qubits leverage quantum physics to process binary states in parallel. The discussion highlights a fundamental divide: interpreting superposition as a mathematical tool versus an observable quantum effect with real-world computational implications. This query underscores broader debates in quantum physics, where experimental validation of qubit behavior could reshape understanding of superposition’s role in technology.