Study on Non-Commutativity Measure of Quantum Discord

Study on Non-Commutativity Measure of Quantum Discord

Blog Article

In this paper, we are concerned with the non-commutativity measure of quantum discord.We first present an explicit expression of the non-commutativity measure of quantum discord in the two-qubit case.Then we compare the geometric quantum discords for two dynamic models with their non-commutativity measure of quantum discords.Furthermore, we show that the results apac1/60/1/cw conducted by the non-commutativity measure of quantum discord are different from those conducted by both or one of the Hilbert-Schmidt distance discord and trace distance discord.

These intrinsic differences indicate that here the non-commutativity measure of quantum discord is incompatible with at least one of the well-known geometric quantum discords in the quantitative and qualitative representation of quantum correlations.