We present a theoretical analysis of the formation of a dendritic array in a directional-solidification experiment. Our calculation contains three sequential ingredients: acceleration of an initially… Expand

Intermolecular zero-quantum coherences (iZQC) induced by the dipolar demagnetizing field can give both P- and N-type cross peaks. This paper shows that the relative intensities of the two types of… Expand

We propose an approximate method for studying steady-state properties and linear stability of the dendritic arrays that are formed in directional solidification of alloys. Our analysis is valid at… Expand

Spin dynamics at planar sites in oxygen-deficient YBa/sub 2/Cu/sub 3/O/sub 6+//sub x/ have been investigated by nuclear spin-lattice relaxation measurements using /sup 63,65/Cu nuclear quadrupole… Expand

Observation des interactions hyperfines avec des centres a liaisons disponibles du silicium, centres K, generees par irradiation UV par rayonnement gamma. La constante de couplage hyperfine des… Expand

A directional solidification study of succinonitrile doped with coumarin 152 was performed in which the pulling speed {ital V}{sub {ital P}} was gradually reduced in small steps. A spatial… Expand

Criteria are given by which dissipative evolution in the weak coupling limit can transfer populations and coherences between quantum subspaces, without a loss of coherence. The result is a form of… Expand

Quantum Monte Carlo (QMC) methods are a class of powerful computer simulation tech niques for solving the many-body Schrodinger equation. These techniques deliver essentially exact results and boast… Expand