Europhys. Lett.
Volume 71, Number 6, September 2005
Page(s) 893 - 899
Section General
Published online 17 August 2005
Europhys. Lett., 71 (6), pp. 893-899 (2005)
DOI: 10.1209/epl/i2005-10187-x

Chaotic dynamics in superconducting nanocircuits

S. Montangero1, A. Romito1, G. Benenti2 and R. Fazio1

1  NEST-INFM and Scuola Normale Superiore ( - Piazza dei Cavalieri 7 I-56126 Pisa, Italy
2  Center for Nonlinear and Complex Systems, Università degli Studi dell'Insubria and INFM - via Valleggio 11, 22100 Como, Italy

received 13 April 2005; accepted in final form 21 July 2005
published online 17 August 2005

The quantum kicked rotator can be realized in a periodically driven superconducting nanocircuit. A study of the fidelity allows the experimental investigation of exponential instability of quantum motion inside the Ehrenfest time scale, chaotic diffusion and quantum dynamical localization. The role of noise and the experimental setup to measure the fidelity is discussed as well.

05.45.Mt - Quantum chaos; semiclassical methods.
74.50.+r - Tunneling phenomena; point contacts, weak links, Josephson effects.
03.65.Yz - Decoherence; open systems; quantum statistical methods.

© EDP Sciences 2005