IAEA-TECDOC-488 INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS Scientific Activities in 1987 A TECHNICAL DOCUMENT ISSUED BY THE INTERNATIONAL ATOMIC ENERGY AGENCY, VIENNA, 1988 IAEe Th A doe t normallsno y maintain stock f reportso thin si s series. However, microfiche copies of these reports can be obtained from INIS Clearinghouse International Atomic Energy Agency Wagramerstrasse5 P.O.Box 100 A-1400 Vienna, Austria Orders should be accompanied by prepayment of Austrian Schillings 100, in the form of a cheque or in the form of IAEA microfiche service coupons orderee b whic y dhma separately fro INIe mth S Clearinghouse. PLEAS AWARE EB E THAT ALL OF THE MISSING PAGES IN THIS DOCUMENT WERE ORIGINALLY BLANK INTERNATIONAL CENTR THEORETICAR EFO L PHYSICS: SCIENTIFIC ACTIVITIES IN 1987 IAEA, VIENNA, 1988 IAEA-TECDOC-488 ISSN 1011-4289 Printed by the IAEA in Austria December 1988 CONTENTS PART I Review of the scientific activities in 1987........................................................... 1 Statistical digest: Summar f participatioo y n (Calendar 1987)...............................................4 . Summar f participatioo y n 198 . 1986.................................................7vs 5 . Participatio geographicay nb l areas..........................................................5 . Number of scientists and man/months by activity...................................... 6 Statistical summary of all activities.......................................................... 7 Participation by activity........................................................................... 8 e scientifiTh PAR I I T c programme Fundamental physics: Researc hign hi h energy physic fundamentad san l theory...........................3 .1 Spring school and workshop on superstrings............................................... 1 4 Conference on indirect evidence of new energy scales from low energy precision experiments..............................................................................5 .1 Summer worksho hign pi h energy physic d cosmology...........................an s 6 .1 Conferenc phenomenologn eo hign i y h energy physics.................................6 .1 Meeting on "Search for scalar particles: Experimental and theoretical aspects"................................................................................................... 1 6 Condensed matter, atomic molecularand physics: Research in condensed matter physics.......................................................^ Third International Workshop on "Total energy and force methods"............. 1 9 Winter college on atomic and molecular physics..........................................20 School on polymer physics.........................................................................20 Worksho surfacn o p e scienc catalysis.................................................2d an e 1 Workshop on nonlinear charge density wave systems................................. 22 Spring college in materials science on "Metallic materials"........................23 Research worksho condensen pi d matter, atomic and molecular physics...............................................................................24 Working party on the physics of porous media............................................26 Mathematics: Mathematics research...............................................................................28 Séminair s espacele r esu s fibres: leur utilisatio physique.....................2n ne 9 Collège on Riemann surfaces......................................................................30 Physics and energy: Third workshop on perspectives in nuclear physics at intermediate energies............................................................................32 Spring college on plasma physics...............................................................33 International conference on cometary plasma physics.................................33 Worksho materialn po s physicscience th d f nonconventionaseo an l energy sources.........................................................................................34 Workshop on economics, modelling, planning and management of energy......35 Worksho interaction po n between physic architecturd an s environmenen i t conscious design........................................................................................36 Physics and environment: Spring colleg geomagnetisn eo aeronomy...........................................3d man 8 Colleg soin o el physics..............................................................................9 .3 Second Autumn workshop on cloud physics and climate............................... 40 Applied physics: Second workshop on mathematics in industry............................................. 4 1 International workshop on remote sensing and resource exploration............ 42 ICFA School on instrumentation in elementary particle physics................... 43 Worksho telematics.............................................................................4n po 4 Fourth college on microprocessors: Technology and applications in physics................................................................................................. 45 Adriatico research conferences: Adriatico research conferenc n undulatoo e r magnet r synchrotrofo s n radiatio d frean ne electron lasers.............................................................6 .4 Adriatico research conferenc one-dimensionan o e l organic conductors: Chemistry, physic applications.........................................................d an s 7 .4 Special Adriatico research conference on high temperature superconductors........................................................................................ 48 Adriatico research conferenc vacuun o e n mnonrelativistii c matter-radiation systems.................................................................................................... 49 Adriatico research conferenc scanninn eo g tunnelling microscopy Fundamental experimental and theoretical progress.................................... 50 Adriatico research conference on interatomic forces in relation to defect d disordean s condensen i r d matter..............................................1 .5 Adriatico research conference on the path integral method with applications......................................................................................2 .5 Other research....................................................................................................54 Microprocessor laboratory.................................................................................5 .5 Network Associateof Members Federatedand Institutes: Regular Associates...................................................................................7 .5 Senior Associates....................................................................................8 .5 Junior Associates.....................................................................................59 Federation Agreements.............................................................................0 .6 Physics and development..................................................................................... 62 The ICTP donation scheme.................................................................................... 63 Hosted activities................................................................................................4 .6 Training and research at Italian laboratories........................................................64 Activities and sponsored projects outside the ICTP Regional activities organized Centre:the by Microcomputers in physics and mathematics.............................................. 65 Worksho fabrication po cosw lo tf o nlaborator y equipmen r physics........6fo t 5 Worksho applicabilite th n po f environmentao y l physics and meteorology in Africa......................................................................... 66 Regional activities co-sponsored by the Centre.....................................................67 Prizes and other celebrations: Alfred Kastler Prize..................................................................................69 Nikolaj N. Bogolubov Prize......................................................................... 69 Dirac Medals............................................................................................0 .7 PAR I II TPublication s issue n 1987..................................................................................7i d 1 Preprints internaland reportsin: Fundamental physics..................................................................................72 Condensed matter physics........................................................................0 .8 Mathematics .............................................................................................89 Nuclear physics......................................................................................... 94 Plasma physics ..........................................................................................5 .9 Other fields............................................................................................... 96 PART I A REVIEW OF THE SCIENTIFIC ACTIVITIES IN 1987 at the International Centre for Theoretical Physics, Trieste, Italy GENERAL The main fields of research and training-for-research at the Centre in 1987 were: (a) Fundamental physics (high energ particld an y e physics, cosmolog astrophysics)d an y ; (b) Condensed matter,