Quantum Information and Cryptography

Quantum information science investigates how the strange behaviors of quantum systems—particularly entanglement, superposition, and measurement—can be harnessed to process, transmit, and secure information in ways that classical physics simply does not permit. At its core, the work spans building reliable quantum computers from physical substrates like superconducting circuits and individual photons, developing cryptographic protocols whose security rests on physical law rather than computational hardness, and pushing the precision limits of measurement through quantum metrology. Central open questions include how to suppress the noise and decoherence that cause quantum hardware to fail before useful computation finishes, and how to construct the long-distance quantum networks that would make entanglement-based cryptography practical at scale. Progress on these problems is converging from multiple directions at once—hardware engineering, algorithm design, and fundamental theory—making the field both technically demanding and unusually fast-moving.

Works

152,404

Total citations

2,536,197

Keywords

QuantumEntanglementCryptographyComputationMetrologySuperconducting Circuits