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Shor’s Quantum Factoring Algorithm on a Photonic Chip

Science  04 Sep 2009:
Vol. 325, Issue 5945, pp. 1221
DOI: 10.1126/science.1173731

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Abstract

Shor’s quantum factoring algorithm finds the prime factors of a large number exponentially faster than any other known method, a task that lies at the heart of modern information security, particularly on the Internet. This algorithm requires a quantum computer, a device that harnesses the massive parellism afforded by quantum superposition and entanglement of quantum bits (or qubits). We report the demonstration of a compiled version of Shor’s algorithm on an integrated waveguide silica-on-silicon chip that guides four single-photon qubits through the computation to factor 15.

  • * These authors contributed equally to this work.

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