The nonequilibrium dynamics of vortices in two-dimensional quantum fluids can be predicted by accounting for the way which vortex ellipticity is coupled to gradient background fluid density. In absence nonlinear interactions, a harmonically trapped analyzed analytically show that single will move an elliptic trajectory has same orientation and aspect ratio as projection itself. This allows esti...

Optical parametric oscillators are one of the building pillars nonlinear and quantum optics, basis minimum-uncertainty states entangled photon pairs. Transferring similar ideas to mechanical vibrations, authors demonstrate an optomechanical oscillator based on a lattice traps that confine couple fluids light sound. Nonresonant continuous laser excitation leads 20 GHz self-induced oscillations p...

objective(s):  medicinal benefits of quantum dots have been proved in recent years but there is little known about their toxicity especially in vivo toxicity. in order to use quantum dots in medical applications, studies ontheir in vivo toxicity is important.  materials and methods:cdse:zns quantum dots were injected in 10, 20, and 40 mg/kg doses to male mice10 days later, mice were sacrificed ...