Regensburg 2004 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 17: Postersitzung II: Transport, Quantenkoh
ärenz, Quantenflüssigkeiten

TT 17.17: Poster

Dienstag, 9. März 2004, 14:30–19:00, Poster A

Quantum holonomies with Josephson-junction devices — •Mateusz Cholascinski — Institut für Theoretische Festkörperphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany — Nonlinear Optics Division, Adam Mickiewicz University, 61614 Poznan, Poland

We examine properties of a Josephson-junction system composed of two coupled Cooper-pair boxes (charge qubits) as a candidate for observation of quantum holonomies. We construct a universal set of transformations in a two-fold degenerate ground state, and discuss the effects of noise in the system. The cheme can be applied to any system of two coupled qubits (independently of physical realization) provided the number of tunable parameters is sufficiently large.