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For carrying out many quantum information protocols entanglement must beestablished in advance between two distant parties. Practically, inevitableinteraction of entangled subsystems with their environments during distributionand storage will result in degradation of entanglement. Here we investigate thedecoherence of two-qubit entangled states in the local amplitude noise. We showthat there exists a set of partially entangled states that are more robust thanmaximally entangled states in terms of the residual quantum correlationmeasured by concurrence, fully entangled fraction, and quantum discord. Thisresult indicates that nonmaximally entangled states can outperform maximallyentangled states for quantum correlation distribution and storage under theamplitude damping. It also educes a notable consequence that the ordering ofstates under quantum correlation monotones can be reversed even by localtrace-preserving and completely positive maps.

Nonmaximally entangled states can be better for quantum correlation distribution and storage