Qubit refers to a two-valued quantity used in

A qubit, or quantum bit, is the fundamental unit of information in quantum computing. While classical computers rely on bits that represent a deterministic value of either 0 or 1, quantum computers utilize qubits that can exist in a state of superposition. This allows a qubit to represent a combination of both 0 and 1 simultaneously, enabling quantum systems to process multiple possibilities at once and perform parallel computations. This two-valued quantity (referring to the basis states |0⟩ and |1⟩) leverages quantum mechanical properties like entanglement and superposition to solve complex problems exponentially faster than classical machines. Consequently, qubits are the building blocks of quantum computers, distinguishing them from the binary logic used in classical cryptography and standard computing architectures.