We show that two qubits, initially in a fully classical state, can develop significant quantum correlations asmeasured by the quantum discord (QD) under the action of a local memoryless noise (specifically we considerthe case of a Markovian amplitude-damping channel). This is analytically proven after deriving in a compactform the QD for the class of separable states involved in such a process.We provide a picture in the Bloch spherethat unambiguously highlights the physical mechanism behind the effect regardless of the specific measure ofquantum correlations adopted.
|Number of pages||5|
|Journal||PHYSICAL REVIEW A|
|Publication status||Published - 2012|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics