Abstract:
This dissertation consists of quantum correlations in composite particles composed
of pairs of elementary bosons or fermions. First we discuss the composite systems in
the context of quantum information theory and then make thier connection with the
composite two particle systems. The main focus is on systems of two distinguishable
elementary fermions, as in the case of hydrogen atom. However, composite particles
of other types have also been discussed. It has been found that such systems may
exhibit their composite behavior depending on how strongly correlated they are,
as measured by the amount of entanglement. The role of entanglement in the
description of composite particles has been explored explicitly and various bounds
and limitations have been discussed. Finally, we discuss the coherent states for
composite particles composed of two or more distinguishable fermions or bosons
as constituent and discussed their properties such as particle counting statistics by
means of Mandel’s Q-parameter.
