Abstract:
In this thesis, entanglement dynamics of two distant qubits placed at a height
h from plasmonic waveguide are investigated. For this purpose, two waveg uide geometries are considered (i) cylindrical nanowire and (ii) V-shaped
channel. To see the evolution of the system, Markovian master equation
approach is used and density matrix elements are extracted. Entanglement
generation is evaluated for ideal plasmonic waveguide and realistic channel
waveguide. The influence of decay rates and coupling parameters on en tanglement dynamics is analyzed. Moreover, entanglement sudden death is
examined at specific qubit-qubit separation for different initial states. At
later time, entanglement rebirth is observed and dark period is estimated for
both geometries. It is noticed that the cylindrical geometry shows lesser dark
period as compared to the V-shaped channel and the revival of entanglement
is much more significant in perior waveguide geometry as compared to the
lateral. Further, super dense coding as an application of quantum entanglement is also examined for certain initial states and it is observed that the
optimal time of dense coding capacity is greater for the case of cylindrical
geometry as compared to V-shaped channel.
