Quantum entanglement of unitary operators on bipartite systems
Xiaoguang Wang, Paolo Zanardi · Physical Review A · 2002
We study the entanglement of unitary operators on ${d}_{1}\ifmmode\times\else\texttimes\fi{}{d}_{2}$ quantum systems. This quantity is closely related to the entangling power of the associated quantum evolutions. The entanglement of a class of unitary operators is quantified by the concept of concurrence.