**Plasmonics for Quantum Information Processing** - Ali Kamli

In the first part of this talk we review the idea of surface plasmon polaritons (SPPs) as surface waves at metal/nonmetal interface and calculate the dispersion curves and quantize the SPPs fields. In the second part of the talk we study the coupling of these modes to atomic systems. We show that SPPs can enhance or suppress the spontaneous decay rate of an atom near by and give numerical results. We also study the quantum entanglement of a two-qubit system interacting with a single mode SPP. We quantify entanglement in terms of negativity
measure and find an analytical expression for the time evolution of the negative eigenvalues for the partial transposition of the density operator in the presence of SPPs. The effect of the plasmonic excitation on entanglement dynamics is explored.