Since their inception more than 2.5 years ago, photon correlation techniques for the spatial, temporal or spectral analysis of fluctuating light fields have found an ever-widening range of applications. Using detectors which re­ spond to single quanta of the radiation field, these methods are intrinsically digital in natnre and in many experimental situations offer a unique degree of accuracy and sensitivity, not only for the study of primary light sources themselves, but most particularly in the use of a laser-beam probe to study light scattering from pure fluids, macromolecular suspensions and laminar or turbulent flowing fluids and gases. Following the earliest developments in laser scattering by dilute macro­ nl01ecular suspensions, in , ... hich particle sizing was the main aim, and the use of photon correlation techniques for laser-Doppler studies of flow and tnrbuence. both of which areas were the subject of NATO ASls in Capri, Italy in 19;:3 and 19;6. significant advances have be('n made in recent years in many other areas. These were reflected in the topics covered in this NATO Advanced Research Workshop, which took place from August 2;th to 30th, 1!)!}6, at the Jagiellonian University, Krakow, Poland. These in­ cluded ('xperimental techniques. statist.ics and data reduction, colloids and aggregation, polymers, gels, liquid crystals and mixtures, protein solutions, critical pllf'nomena and dense media.

Colloids.- Experimental challenges in colloids.- Dynamic depolarized light scattering studies of anisotropic Brownian particles.- Application of the dynamic light scattering method for investigation of colloidal stability.- Long-time dynamics of concentrated colloidal suspensions.- Methods.- Suppression of multiple scattering using a single beam cross-correlation method.- Theory of multiple scattering suppression in cross-correlated light scattering employing a single laser beam.- X-ray photon correlation spectroscopy.- Polarisation fluctuations in radiation scattered by small particles.- Surface light scattering spectroscopy.- Non-linearity of APDs at high count rates.- From speckles to modes: principles and applications of fiber optic dynamic light scattering..- Polymers, Gels, Liquid Crystals, Mixtures.- Photon correlation spectroscopy of interactive polymer systems.- Local dynamics in branched polymers.- Spontaneous domain growth in the one-phase region of a gel/mixture system.- The shape, dimension and organisation of maltodextrins gel fragments with and without associated phospholipids.- Dynamic light scattering from block copolymers.- Particle diffusion and crystallisation in suspensions of hard spheres.- Use of light scattering to characterize the polysaccharides of starch.- Statistics and Data Processing.- Spatial photon correlation and statistics of nonlinear processes in nonlinear waveguides.- Photon correlation of correlated photons: experimental aspects of quantum cryptography and computation.- New opto-electronic technologies for photon correlation experiments.- Correlated, superposed and squeezed vibrational states.- Structure and properties of linear inverse problems.- New ideas in data. inversion in photon correlation spectroscopy.- Tempest in a teapot-surface and volume turbulence in a closed system.- Scattering by Dense Media.- Diffusing photon correlation.- Photon correlation spectroscopy of opaque fluids.- Scattering of light in inhomogeneous medium.- Observation of shear-induced gelation using light scattering imaging.- Single particle motion of hard-sphere-like polymer micronetwork colloids up to the colloid glass transition.- Measurement of viscoelasticity of complex fluids by diffusing-wave spectroscopy.- Space Applications.- Applying photon correlation spectroscopy in space.- IIard spheres in space: light scattering from colloidal crystals in microgravity.- Zeno: Critical fluid light scattering in microgravity.- Phase Separation and Critical Phenomena.- Static and dynamic light scattering in phase-separating systems.- Shear induced displacement of the spinodal, and spinodal demixing kinetics under shear.- Spectral kinetic and correlation characteristics of inhomogeneous mixtures in the vicinity of the critical point of stratification.- List of participants.