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Quantum discord for general two--qubit states: Analytical progress

PHYSICAL REVIEW A, no. 5 (2011)

Cited: 269|Views8

Abstract

We present a reliable algorithm to evaluate quantum discord for general two-qubit states, amending and extending an approach recently put forward for the subclass of X states. A closed expression for the discord of arbitrary states of two qubits cannot be obtained, as the optimization problem for the conditional entropy requires the solut...More

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