Quantum interference and non-linear spectroscopy Final report

An experimental and theoretical program aimed at investigating the quantum coherence induced effects in an atomic system, was carried out. The experimental program was carried out on both cesium and rubidium atomic systems, in which we probed the effects of coherences between various atomic states. These coherences were found to influence the optical pumping properties and the population transfer mechanisms in these systems. The experiments probed these properties in both an atomic beam and in an optically created cold atomic lattice. Using a unique method, we optically pumped Cs in an atomic beam into a single quantum state, thus allowing us to prepare a spin aligned system. Once in a single quantum state, the atom was then available for further interaction with a laser, and we were able to study the evolution of the atomic state coherences. The dependence of the coherence on laser linewidth, external magnetic field and laser polarization was examined both theoretically and experimentally. We also developed a single mode diode laser for operation at 895 nm for probing the cesium D_1 line, for which laser diodes were until now not accessible. In another experiment, on laser cooled rubidium atoms, we probed the atomic lattice by Bragg diffraction of coherent light. By an additional probe spectroscopy we could probe the minute atomic motions of an atom deeply bound in a potential well. (orig.)SIGLEAvailable from TIB Hannover: F98B1587 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekGerman-Israeli Foundation for Scientific Research and Development (GIF), Oberschleissheim (Germany)DEGerman

Untersuchungen des Flusslinienschmelzens in Hoch T_c-Supraleitern durch Messungen der Magnetisierung und der spezifischen Waerme

SIGLEAvailable from TIB Hannover: DtF QN1(57,11) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Basic properties of YBa_2Cu_3O_x vs. charge carrier density Final scientific report

SIGLEAvailable from TIB Hannover: DtF QN1(48,8) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekGerman-Israeli Foundation for Scientific Research and Development (GIF), Oberschleissheim (Germany)DEGerman

High resolution doppler free laser spectroscopy. Application to cesium Final report for the years 1988-1992

Available from TIB Hannover: F95B467 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEGerman-Israeli Foundation for Scientific Research and Development (GIF), Oberschleissheim (Germany)DEGerman

Influence of thermal fluctuations and artificial defects on vortex pinning and dynamics in high-temperature superconductors Final scientific report

One of the aims of this project was to develop two new and complementary experimental measurement techniques for study of vortex dynamics in high-temperature superconductors (HTSC): the sensitive vibrating reed and the microscopic arrays of Hall sensors. The purpose of this research was the study of the influence of pinning (due to intrinsic or incorporated pinning centers and geometrical or surface barriers) and thermal fluctuations on the electromagnetic properties of HTSC crystals and thin films. A substantial progress in these tasks was achieved. The vibrating reed system with capacitive and laser interferometry detection was developed in Bayreuth-Leipzig Universities and the microscopic Hall-sensor arrays have been developed and manufactured at the Weizmann Institute and successfully used for several studies of HTSC crystals. A technique for incorporation of submicron defect structures in thin films has been developed and tested. In addition significant progress in theoretical analysis of vortex dynamics has been achieved through the collaboration with Bar-Ilan University. (orig.)Available from TIB Hannover: F00B233 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEGerman-Israeli Foundation for Scientific Research and Development (GIF), Oberschleissheim (Germany)DEGerman

Genetic markers in Sarotherodon and their use for sex and specie identification Final scientific report. Expertise. Report period: January 1981 - April 1984

TIB: AC 9036 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

In vitro and in vivo studies of the immune response in fish Scientific report. Expertise. German final report. Report period: January 1983 - April 1984

SIGLETIB: AC 9024 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

In vitro and in vivo studies of the immune response in fish Scientific report. Expertise. German final report. Report period: January 1983 - April 1984

SIGLETIB: AC 9024 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Algebraic graph theory and its application in mathematical chemistry Final scientific report

Algebraic graph theory uses linear algebra, group theory and other parts of algebra for the investigation of graphs. In our project we have been concerned with the development of modern techniques for the identification and symmetry perception of graphs with an emphasis in mathematical chemistry and chemical crystallography. The main tool in almost all investigations has been coherent (cellular) algebras which were introduced 30-40 years ago independently in the former USSR, the USA and Germany. Special attention was paid to Schur rings (S-rings) - an important particular case of coherent algebras. Now we report on the fulfilment of all lines of the original research proposal. According to the research plans, the activities in the framework of the project may be divided into 4 main areas: - investigation of Galois connections between relational algebras and clones of functions, especially of permutation groups, study and applications of several new classes of coherent algebras; - investigation of circulant graphs, that is of Cayley graphs over cyclic groups, via the method of S-rings, elaboration of new isomorphism criteria for these graphs, their analytical enumeration; - study of Birkhoff (compact) and weakly compact graphs on the base of coherent algebras and polytopes of doubly stochastic matrices, establishment of new efficient polynomial-time procedures for isomorphism testing of this class of graphs; - applications of coherent algebras in mathematical chemistry, establishment of a rigorous mathematical groundwork for the Graph Set Analysis, a new method of investigations in chemical crystallography, which was suggested and developed in the USA and Israel over the past 8 years. (orig.)SIGLEAvailable from TIB Hannover: F00B273 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekGerman-Israeli Foundation for Scientific Research and Development (GIF), Oberschleissheim (Germany)DEGerman