We show that two qubits, initially in a fully classical state, can develop significant quantum correlations as measured by the quantum discord (QD) under the action of a local memoryless noise (specifically we consider the case of a Markovian amplitude-damping channel). This is analytically proven after deriving in a compact form the QD for the class of separable states involved in such a process.We provide a picture in the Bloch sphere that unambiguously highlights the physical mechanism behind the effect regardless of the specific measure of quantum correlations adopted.
Ciccarello, F., Giovannetti, V. (2012). Creating quantum correlations through local non-unitary memoryless channels. PHYSICAL REVIEW A, 85, 010102-1-010102-5 [10.1103/PhysRevA.85.010102].
Creating quantum correlations through local non-unitary memoryless channels
CICCARELLO, Francesco;
2012-01-01
Abstract
We show that two qubits, initially in a fully classical state, can develop significant quantum correlations as measured by the quantum discord (QD) under the action of a local memoryless noise (specifically we consider the case of a Markovian amplitude-damping channel). This is analytically proven after deriving in a compact form the QD for the class of separable states involved in such a process.We provide a picture in the Bloch sphere that unambiguously highlights the physical mechanism behind the effect regardless of the specific measure of quantum correlations adopted.File | Dimensione | Formato | |
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