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Introduction to NMR Quantum Information Processing by Laflamme, R.; Knill, E.; Cory, D. G.; Fortunato, E. M.; Havel, T.; Miquel, C.; Martinez, R.; Negrevergne, C.; Ortiz, G.; Pravia, M. A.; Sharf, Y.; Sinha, S.; Somma, R.; Viola, L. is a scholarly article available to read on EtoBox.

What is Introduction to NMR Quantum Information Processing about?

After a general introduction to nuclear magnetic resonance (NMR), we give the basics of implementing quantum algorithms. We describe how qubits are realized and controlled with RF pulses, their internal interactions, and gradient fields. A peculiarity of NMR is that the internal interactions (given by the internal Hamiltonian) are always on. We discuss how they can be effectively turned off with the help of a standard NMR method called ``refocusing''. Liquid state NMR experiments are done at room temperature, leading to an extremely mixed (that is, nearly random) initial state. Despite this high degree of randomness, it is possible to investigate QIP because the relaxation time (the time scale over which useful signal from a computation is lost) is sufficiently long. We explain how this feature leads to the crucial ability of simulating a pure (non-random) state by using ``pseudopure'' states. We discuss how the ``answer'' provided by a computation is obtained by measurement and how this measurement differs from the ideal, projective measurement of QIP. We then give implementations of some simple quantum algorithms with a typical experimental result. We conclude with a discussion o

Author

Laflamme, R.; Knill, E.; Cory, D. G.; Fortunato, E. M.; Havel, T.; Miquel, C.; Martinez, R.; Negrevergne, C.; Ortiz, G.; Pravia, M. A.; Sharf, Y.; Sinha, S.; Somma, R.; Viola, L.

Published

2002

Language

EN