Spin-fluctuation gating in the c-axis
non-Drude conductivity of the high T_c cuprates

¹Moscow Institute of Steel and Alloys, Theoretical Physics Department, Leninskii Pr. 4, 117936 Moscow B-49, Russia
²Department of Physics, Center for Superconductivity Research, University of Maryland, College Park, MD 20742, USA
^*present address: Max-Planck-Institut für Physik komplexer Systeme, Bayreuther Strasse 40, Haus 16, D-01187 Dresden, Germany

Received 5 June 1996, accepted 9 October 1996

Keywords: C-axis conductivity; High Tc cuprates; Spin fluctuations

Low temperature equilibrium correlation functions in dissipative quantum systems

¹Institut für Theoretische Physik, Ruprecht-Karls-Universität, Philosophenweg 19, D-69120 Heidelberg, Germany

Received 31 July 1996, accepted 24 September1996

Keywords: Flow equations for Hamiltonians; Spin-boson model; Super-Ohmic bath

Universal elementary constituents of potential transformations shifting waves (qualitative theory)

¹Laboratory of the Theotetical Physics, Joint Institute for Nuclear Research Dubna, 141980, Russia
²Department of Physics, University of South Africa, Pretoria, South Africa

Received 21 May 1996, revised version 14 August 1996, accepted 9 October 1996

Keywords: Spectral weights variation; Wave bunching; Bound and scattering states; Quantum intuition

On the interbasis expansion of the Kaluza-Klein monopole system

¹Institut für Theoretische Physik, Technische Universität Clausthal, Sommerfeldstr. 6, D-38678 Clausthal-Zellerfeld, Germany
¹II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany
²Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research (Dubna), 141980 Dubna, Moscow Region, Russia

Received 20 August 1996, revised version 28 November 1996, accepted 10 December 1996

Keywords: Quantum mechanics; Kaluza-Klein monopole; Interbasis expansion