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The power of one qubit deterministic quantum processor (DQC1) (Knill and Laflamme (1998)) generates a nonclassical correlation known as quantum discord. The DQC1 algorithm executes in an efficient way with a characteristic time given byτ=Tr[Un]/2n, whereUnis annqubit unitary gate. For pure states, quantum discord means entanglement while for mixed states such a quantity is more than entanglement. Quantum discord can be thought of as the mutual information between two systems. Within the quantumdoi:10.1155/2014/367905 fatcat:6hbdx3zkwzbtzctf4qvz3w4w6e