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Modern Studies of Basic Quantum Concepts and Phenomena

(1997, NS 104)
June 14-17, 1997
Gimo Herrgård, Gimo, Sweden
Organizers: Professor Erik B. Karlsson (Chairman), Associate Professor Erkki Brändas, Professor Osvaldo Goscinski and Professor Carl Nordling, Uppsala University; Professor Bengt Nagel and Associate Professor Göran Lindblad, Royal Institute of Technology, Stockholm; and Professor Gösta Ekspong, Stockholm University.

Although quantum mechanics existed for more than 70 years, its inner structure and applicability are still being discussed. The fathers of quantum mechanics presented "Gedanken experiments" that have only been possible to carry out over the past 10-15 years, thanks to various technological developments. These experiments have answered many questions but have also led to new ones requiring further and more detailed studies of fundamental quantum phenomena, such as locality and reversibility. Symposium participants explained the refined measuring methods that led to this knowledge, as well as the resulting conclusions about the nature of light and matter (knowledge that, in many cases, may be used for technical applications in the near future).

Interferometric methods can be applied nowadays not only to photons, but also to particle waves (electrons, neutrons and atoms as a whole). Individual atoms can be captured and controlled in traps or cavities and be made to couple quantum mechanically to each other via photon or phonon fields. Electronic circuits can be built so small that they approach atomic dimensions. Wave function coherence plays a crucial role in theoretical descriptions of these "new" systems, and much of the symposium was devoted to the conditions governing quantum mechanical coherence and its preservation.

The conditions that govern coherence also play a vital role in existing proposals for "quantum computers," which were discussed at the symposium both in terms of technical design and their information theory aspects. Other interesting aspects are the potential this offers in cryptogarphy, as well as the sensational concept of "teleportation."

The natural limitations of measuring technology have always been a key point in quantum mechanics. Here too, major progress has recently been achieved, under certain circumstances enabling researchers to improve the accuracy of measurements of a certain magnitude (at the expense of accuracy in another). This will be important, for example, in recording gravitational waves from cosmic explosions.

The participants agreed that today this field is in a highly interesting phase of development and that the timing of the symposium was very well chosen in light of future work. Symposium contributions have been published in the journal Physica Scripta and as a separate volume in cooperation with World Scientific, Singapore.

Participants  
Yakir Aharonov
Tel Aviv University, Israel
Adrian Kent
University of Cambridge
UK
Mauritz Andersson
Institutionen för Kvantkemi
Uppsala, Sweden
Jeff Kimble
Caltech, USA
Alain Aspect
Institut d'Optique, France
Peter L. Knight
Imperial College
London, UK
Anders Bárány
Stockholm University
Stockholm, Sweden
Paul G. Kwiat
Los Alamos National Lab.,
USA
Ingemar Bengtsson
Stockholm University, Stockholm, Sweden
Rolf Landauer
IBM Thomas J. Watson Research Center, USA
Charles H. Bennett
IBM Research Division, USA
Anthony Leggett
University of Illinois
USA
Gunnar Björk
KTH, Stockholm, Sweden
Jon Magne Leinaas
Fysisk Institut, Oslo, Norway
Vladimir Braginsky
Moscow State University,
Russia
Göran Lindblad
KTH, Stockholm, Sweden
Erkki Brändas
Institutionen för Kvantkemi
Uppsala, Sweden

Leonard Mandel
University of Rochester USA

Henrik Carlsen
Institutionen för Kvantkemi
Uppsala, Sweden
Jürgen Mlynek
Universität Konstanz
Germany
Raymond Chiao
University of California, Berkeley, Calif., USA
Bengt Nagel
Fysiska Insitutionen
Uppsala, Sweden
Tord Claeson
Fysiska Inst., CTH
Göteborg, Sweden
Carl Nordling
Fysiska Insitutionen
Uppsala, Sweden
Claude Cohen-Tannoudji
Ecole Normale Supérieure
France
Asher Peres
Technion, Israel
Michel Devoret
CEA, Saclay, France
Helmut Rauch
Atominstitut der Österreichischen Unversitäten, Austria
C. A. Driesmann
Techniscke Universität Berlin, Germany
Wolfgang Schleich
Univesität Ulm, Germany
Artur K. Ekert
Oxford University, UK
Marlan O. Scully
Texas A & M University
USA
Gösta Ekspong
Stockholm University, Stockholm, Sweden
Bo-Sture Skargerstam
Norwegian University of Science and Technology
Trondheim, Norway

Edward Fry
Texas A & M University, USA

Stig Stenholm
Fysiska Institutionen
Uppsala, Sweden

Daniel M. Greenberger
CCNY, New York, USA
Sune Svanberg
Lunds Tekniska Högskola
Lund, Sweden
Osvaldo Goscinski
Institutionen för Kvantkemi
Uppsala, Sweden
Hideaki Takanayagi
NTT Basic Research Laboratories, Japan
Serge Haroche
Ecole Normale Supérieure
France
Akira Tonomura
Advanced Research Laboratory, Hitachi Ltd.
Japan
James B. Hartle
USCB, Santa Barbara, USA

Herbert Walther
Max-Planck-Institut für Quantenoptik, Germany

Björn Hessmo
Institutionen för Kvantkemi
Uppsala, Sweden

David Wineland
NIST, USA

Yoseph Imry
Weizmann Institute for Science, Israel

Yoshihisa Yamamoto
Stanford University
USA

Cecilia Jarlskog
LTH, Lund, Sweden
Anton Zeilenger
Innsbruck University
Austria
Mats Jonson
CTH, Göteborg, Sweden
Peter Zoller
Universität Innsbruck
Austria
Erik B. Karlsson
Fysiska Institutionen
Uppsala, Sweden
Wojciech Zurek
Los Alamos National Laboratory, USA
Anders Karlsson
KTH-Elektrum
Kista, Sweden
 

 

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