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

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.
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].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/64895
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