Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 7: Quanteninformation (Ionen)
Q 7.4: Vortrag
Montag, 19. März 2007, 15:45–16:00, 5L
Trapped ion chain as a neural network: Error resistant quantum computation — Marisa Pons1, Veronica Ahufinger2,3, Christof Wunderlich4, Anna Sanpera2,5, •Sibylle Braungardt6, Aditi SenDe6, Ujjwal Sen6, and Maciej Lewenstein2,6 — 1Departamento de Física Aplicada I, Universidad del País Vasco, 20600 Eibar, Spain. — 2ICREA - Institució Catalana de Recerca i Estudis Avançats, Passeig Lluis Companys 23, E-08010 Barcelona, Spain*. — 3Grup d*Optica, Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain. — 4Fachbereich Physik, Universität Siegen, 57068 Siegen, Germany. *Fachbereich Physik, Universität Siegen, 57068 Siegen, Germany. — 5Grup de Física Teòrica, Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain. — 6ICFO-Institut de Ciències Fotòniques, 08860 Castelldefels (Barcelona), Spain.
We consider experimentally feasible chains of trapped ions with pseudo-spin half, and *nd models that can potentially be used to implement error resistant quantum computation. We consider protocols for implementing a universal set of quantum logic gates in the system, by adiabatic passage of a few low-lying energy levels of the whole system. We show that the *delity of the computation remains virtually unchanged when introducing noise to the system, if the noise is not too strong. The noise resistance of the system is achieved by encoding the qubits distributed over the whole system, and is similar in spirit to that of classical neural networks.