Nonclassical correlations in superconducting circuits

A key step on the road map to solid-state quantum information
processing (and to a deeper understanding of many counterintuitive
aspects of quantum mechanics) is the generation
and manipulation of nonclassical correlations between different
quantum systems. Within this framework, we analyze the
possibility of generating maximally entangled states in a system
of two superconducting flux qubits, as well as the effect
of their own environments on the entanglement dynamics. The
analysis reported here confirms that the phenomena of sudden
birth and sudden death of the entanglement do not depend on
the particular measure of the entanglement adopted.