Sam Braunstein

University of York

The ever growing need to process and communicate information faster, more reliably and more securely constitutes a continuing major challenge. Until recently, efforts have been restricted to the classical regime. Quantum information, which relies on extremely fragile superpositions that are subject to the devastating effects of decoherence, has been largely avoided. Surprisingly, we are learning that quantum information may be handled robustly and with unprecedented efficiency. The Uncertainty Principle, once regarded as detrimental, has turned out to be an essential feature of entanglement-based quantum computation and communication schemes. These include the teleportation of a quantum state, which has recently been achieved experimentally. Other promising applications include quantum cryptography, dense coding and quantum computation.

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