Reactivity dynamics in atom-field interactions: A quantum fluid density functional study

Dynamical behavior of chemical reactivity indices like electronegativity, h ardness, polarizability, entropy, electrophilicity and nucleophilicity indi ces and uncertainty product is studied within a quantum fluid density funct ional framework for the interactions of a helium atom in its ground and exc ited electronic states with monochromatic and bichromatic laser pulses with different intensities. Time dependent analogues of various electronic stru cture principles like the principles of electronegativity equalization. max imum hardness, minimum polarizability and maximum entropy have been found t o be operative. Insights into the variation of intensities of the generated higher order harmonics on the color and intensity of the external laser fi eld are obtained.