Klaus Morawetz

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The short-time dynamics of correlated systems is strongly influenced by initial correlations, giving rise to an additional collision integral in the non-Markovian kinetic equation. Exact cancellation of the two integrals is found if the initial state is thermal equilibrium, which is an important consistency criterion. Analytical results are given for the(More)
The fascinating ability of algae, insects, and fishes to survive at temperatures below normal freezing is realized by antifreeze proteins (AFPs). These are surface-active molecules and interact with the diffusive water-ice interface thus preventing complete solidification. We propose a dynamical mechanism on how these proteins inhibit the freezing of water.(More)
Starting from the generalized kinetic equation including complete time evolution , the memory eeect of the collision integral is calculated. It is found, that the innuence of the collisions on the time development of the distribution function is diminished by the non-Markovian behavior of the collision integrals, which is an expression of collision(More)
  • K Morawetz
  • 2013
The general possible form of mean-field parametrization in a running frame in terms of current, energy, and density functionals is examined under the restrictions of Galilean invariance. It is found that only two density-dependent parameters remain which are usually condensed in a position-dependent effective mass and the self-energy formed by current and(More)
The quantum mechanical two-particle problem is considered in hot dense nuclear matter under the innuence of a strong electric eld such as the eld of the residual nucleus in heavy ion reactions. Compared with the in-medium properties in the zero-eld case, bound states are turned into resonances, and the scattering phase shifts are modiied. Three eeects are(More)
Liquid salty micro-channels (brine) between growing ice platelets in sea ice are an important habitat for CO2-binding microalgaea with great impact on polar ecosystems. The structure formation of ice platelets is microscopically described and a phase field model is developed. The pattern formation during solidification of the two-dimensional interstitial(More)
Brine channels are formed in sea ice under certain constraints and represent a habitat of different microorganisms. The complex system depends on a number of various quantities as salinity, density, pH value, or temperature. Each quantity governs the process of brine channel formation. There exists a strong link between bulk salinity and the presence of(More)