Quantum Information and Cryptography

Quantum information science investigates how the counterintuitive properties of quantum mechanics — particularly entanglement, superposition, and the irreversible nature of measurement — can be harnessed to process and transmit information in fundamentally new ways. Where classical cryptography relies on the computational difficulty of certain mathematical problems, quantum cryptography can offer security guarantees rooted in physical law itself, making certain forms of eavesdropping detectable in principle. Physical implementations, from superconducting circuits cooled near absolute zero to precisely controlled single photons, are at the center of ongoing efforts to build devices reliable and large enough to outperform classical systems on practical tasks. Central open questions include whether fault-tolerant quantum computers can be built before decoherence and error rates overwhelm their advantages, and how quantum communication networks can be scaled and integrated into existing infrastructure without sacrificing the security properties that make them attractive.

Works

154,494

Total citations

2,560,301

Keywords

QuantumEntanglementCryptographyComputationMetrologySuperconducting Circuits