 Noisy intermediate-scale quantum era

Era of quantum computing before we reach physical errors small enough to do perfect quantum error correction as demonstrated by the quantum threshold theorem.

The term "Noisy Intermediate-Scale Quantum (NISQ) era" refers to the current stage of quantum computing technology, characterized by the existence of quantum processors that possess a limited number of qubits (typically ranging from tens to a few hundred) and are susceptible to errors due to decoherence and noise. NISQ devices are not yet capable of performing error-corrected quantum computations, which makes them "noisy" and intermediary between classical and full-scale quantum computing.