Bose-Einstein condensation of dilute trapped atomic gases @1,2# essentially depends on the interparticle interactions. In most experiments so far the dominated interactions have been short-range van der Waals forces which are characterized by the s-wave scattering length a. Spatially homogeneous condensates with positive scattering length ~repulsive interaction! are stable while condensates wit...

We found the exact solution for a model consisting of two dipole-coupled qubits, one which is an isolated, and other interacts with thermal mode cavity Kerr medium. The results showed that nonlinearity may greatly enhance degree entanglement induced by field both separable entangled initial states qubits. also possibility disappearance sudden death nonlinearity. Keywords: field, nonlinearity, d...

The selection rules for dipole and Raman activity can be relaxed due to local distortion of a crystalline structure. In this situation a dipole-inactive mode can become simultaneously active in Raman scattering and in dipole interaction with the electromagnetic field. The later interaction results in disorder-induced polaritons, which could be observed in first-order Raman spectra. We calculate...

The operational principle of offshore wind farms (OWF) is to extract kinetic energy from the atmosphere and convert it into electricity. Consequently, a region reduced speed in shadow zone an OWF, so-called wind-wake, generated. As there horizontal deficit between wind-wake undisturbed neighboring regions, locally surface stress results adjusted Ekman transport. Subsequently, creation dipole pa...

using hartree-fock su-sheriffer-heeger (hf-ssh) model, we have studied the dependence of the energies of the ground (magnetic triplet state) and the first exited (nonmagnetic singlet state) states of the size-2 trigonal zigzag graphene nanoflake (size-2 nf) on the intensity of an external in plane static electric field at zero temperature. we identify a transition from the magnetic triplet stat...