Spin squeezing and quantum correlations

We discuss the notion of spin squeezing considering two mutually exclusive classes of spin-s states, namely, oriented and non-oriented states. Our analysis shows that the oriented states are not squeezed while non-oriented states exhibit squeezing. We also present a new scheme for construction of spin-s states using 2s spinors oriented along different axes. Taking the case of s=1, we show that the ‘non-oriented’ nature and hence squeezing arise from the intrinsic quantum correlations that exist among the spinors in the coupled state.     

Radiative collisions and two-photon transitions

We explore the heuristic connections between laser-induced energy transfer in radiative collisions and a simple two photon transition involving two near-resonant fields.     

Neutron activation analysis of wear products in a Diesel engine fueled with coal-oil slurries

The technique described is a stable tracer method and has the advantage of eliminating the use of radioactive engine components during the wear tests. The results obtained clearly show that the use of these slurries comprising pulverized coal and fuel oil is not acceptable due to excessive wear rates.     

Photophysics of the B̃ 1A1 state of thiophosgene

The results of fluorescence lifetime measurements using a dye laser excitation source are combined with other recently published data to present a consistent picture of the photophysics of the B? ¹A₁ state of Cl₂CS.