Similar challenges - different responses: Housing policy in Germany and Russia between the two world wars

The World War I played a key role in shaping modern housing policy. While in the pre-War time virtually no housing policy existed, the beginning of hostilities led to an almost immediate and comprehensive state intervention in the housing market, particularly among those engaged in the war. Despite initially similar conditions and challenges induced by the war, housing policy was carried out in different countries differently. This is particularly true for Germany and Russia. Even though both went through similar processes during the inter-war era, the different objective functions pursued by their political regimes shaped their housing policies in completely different manners. This paper compares the housing policies in Germany and Russia, identifying the similarities and differences

Multiple Quantum NMR and Entanglement Dynamics in Dipolar Coupling Spin

We investigate numerically the time dependence of the multiple quantum coherences and entanglement in linear chains up to nine nuclear spins of 1/2 coupled by the dipole-dipole interactions. Two models are considered: (1) a spin chain with nearest-neighbor dipole -dipole interactions; (2) a more realistic model with interactions between all spins. It is shown that the entangled states appear between remote particles which do not interact directly (model 1), while the interaction between all spins (model 2) not always results in entanglement between remote spins.Comment: 14 pages, 3 figures. accepted for publication in Physical Review