Landmark papers, explained

Quantum Research Papers, Explained

The papers that shaped quantum computing — from Shor and Grover to quantum supremacy and utility — summarized in plain language with the key ideas and why they matter.

Algorithms1994

Algorithms for Quantum Computation: Discrete Logarithms and Factoring

Peter W. Shor

Shows a quantum computer can factor large integers exponentially faster than the best known classical algorithm — the result that launched quantum cryptanalysis.

Algorithms1996

A Fast Quantum Mechanical Algorithm for Database Search

Lov K. Grover

Provides a provable quadratic speedup for searching an unstructured space — the second foundational quantum algorithm.

Perspective2018

Quantum Computing in the NISQ Era and Beyond

John Preskill

Coins the term 'NISQ' and sets realistic expectations for what near-term, noisy quantum devices can and cannot do.

Experiment2019

Quantum Supremacy Using a Programmable Superconducting Processor

Frank Arute, Kunal Arya, Ryan Babbush, et al. (Google AI Quantum)

Reports the first experimental demonstration that a quantum processor can perform a specific task infeasible for classical supercomputers.

Experiment2023

Evidence for the Utility of Quantum Computing Before Fault Tolerance

Youngseok Kim, Andrew Eddins, Sajant Anand, et al. (IBM Quantum)

Shows a noisy 127-qubit processor with error mitigation producing accurate results beyond brute-force classical simulation — 'quantum utility'.