1105.5551 (Francesco Ciccarello et al.)

Creating quantum correlations through local non-unitary memoryless
channels    [PDF]

Francesco Ciccarello, Vittorio Giovannetti

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 QCs adopted.

View original: http://arxiv.org/abs/1105.5551