Regensburg 2010 – scientific programme

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TUT: Tutorials

TUT 2: Tutorial: Physics of NMR - Physics with NMR

TUT 2.1: Tutorial

Sunday, March 21, 2010, 16:00–16:45, H3

Spins as Qubits — •Dieter Suter — Fakultät Physik, TU Dortmund

Processing of digital information has progressed at an enormous speed over the last decades and thus become an indispensable resource. Still, for some computational problems, no efficient algorithms are known for today’s computers. For some of these problems, an exponential speedup is possible if the computers operate according to Schrödinger’s equation, processing the information by unitary transformations. Nuclear spins were the first physical systems used to implement quantum algorithms; in the meantime, several other systems have become available for quantum information processing, all drawing directly from the techniques that NMR has developed for accurately controlling the dynamics of quantum mechanical systems. We will discuss some demonstration experiments that use magnetic resonance techniques to process quantum information stored in nuclear and electronic spins. Since today’s quantum computers are based on a small number of qubits, their computational power is quite limited. To make them more powerful, it will be necessary to increase the number of qubits. Many concepts have been proposed that may eventually unlock this potential, some of them based on electronic and nuclear spins.

Literature: J. Stolze and D. Suter, Quantum Computing: A Short Course from Theory to Experiment, Wiley-VCH, Berlin, 2nd edition (2008).