Josephson Junctions Arrays and Confined Systems


April 22 May 2, 2003



The Workshop brought together leading researchers engaged with the theory of Josephson junction arrays and spatially confined systems. This new field of condensed matter physics appeared as a response of the mesoscopic community to the quest of the emerging nanotechnology for a scientific base for the new generation of the telecommunication, memory and recording, and computational devices and quantum computing. The format of the Workshop (about thirty five participants; two theoretical talks in the morning and one full day of experimental talks) was designed to provide a forum for discussion and collaboration on scientific issues and topics crucial to the current nanoscale science and its related technological applications. The Workshop was organized jointly by the Lorentz Center, Materials Theory Institute at Argonne National Laboratory, and Kamerlingh-Onnes Laboratory at Leiden University as a part of a broad international partnership, International Collaboration on Advanced Materials (ICAMP) initiated by MTI and the Lorentz Center. The partnership aims at establishing a highly interactive and cooperative environment for efficient research in materials science crucial for nanotechnology. The main body of invitees constituted scientists who had already initiated several joint research programs during the previous workshop at Argonne National Laboratory in October November 2002, joined by the researchers from TU Delft, Twente University, and other local institutions. The wide representation of experimentalists from TU Delft, one of the world-leading institutions engaged with the nanoscale physics was of special importance. The workshop was also beneficial to graduate students and young researchers from local institutions who were actively attending both theoretical and experimental presentations. During the workshop the projects initiated earlier at Argonne National Laboratory were continued and several new scientific programs were seeded.


The atmosphere of intense discussions set by the Workshop was one of its major achievements. This was specifically advantageous for younger researchers who had a rare opportunity to have their work thoroughly and friendly scrutinized by the leading experts in the field, and who, in their turn, could question senior experts in detail pursuing complete clarity.


The topics covered included


         SFS junctions and pi-contacts (A.F. Volkov, Ya. M. Blanter, A.A. Golubov, Henk-Jan Smilde, V. Ryazanov, A. Rusanov, A. Buzdin, A. Lopatin),

         Quantum effects in small-size junctions (Hans Mooij, A. V. Ustinov, M. V. Fistul),

         Intrinsic Josephson effect: nonequilibrium properties (J. Keller),

         Josephson vortices and crossing vortex lattices in layered superconductors (L. Bulaevskii, Yu.I. Latyshev, M. J.W. Dodgson, V.V. Kurin, M. Machida),

         Proximity effects (Andrei Zaikin),

         Josephson junction arrays (Veronica I. Marconi)


The workshop was organized as series of half hour lectures, ~ 2 lectures per day. One day was reserved for the mini-conference, in which experimentalists presented their recent results.


The format of the workshop: small number of participants, relaxed program of talks giving plenty of time for the informal discussions between participants, allowed the very efficient exchange of recent results and ideas on important subjects. The workshop was highly successful and all participants enjoyed their stay in Leiden.


The personal of the Lorentz Center was very efficient and helpful. The excellent professional support received from the workshop coordinators, Dr. M. Kruk and Ms. G. Filippo, have made the workshop even more enjoyable. We take this opportunity to thank them for their hospitality and help.


V. Vinokur (Argonne IL, U.S.A.)

A. Koshelev (Argonne IL, U.S.A.)

P.H. Kes (Leiden University, The Netherlands)