Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2000-11-02
Nature Vol. 407, 355 (2000)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages
Scientific paper
10.1038/35030052
When a quantum mechanical system undergoes an adiabatic cyclic evolution it acquires a geometrical phase factor in addition to the dynamical one. This effect has been demonstrated in a variety of microscopic systems. Advances in nanotechnologies should enable the laws of quantum dynamics to be tested at the macroscopic level, by providing controllable artificial two-level systems (for example, in quantum dots and superconducting devices). Here we propose an experimental method to detect geometric phases in a superconducting device. The setup is a Josephson junction nanocircuit consisting of a superconducting electron box. We discuss how interferometry based on geometrical phases may be realized, and show how the effect may applied to the design of gates for quantum computation.
Falci Giuseppe
Fazio Rosario
Massimo Palma G.
Siewert Jens
Vedral Vlatko
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