Quantum correlations on chain-type quantum network

Abstract

Quantum network concerns several independent entangled resources and can create strong quantum correlations by performing joint measurements on some observers. In this paper, we discuss an $n$-partite chain network with each two neighboring observers sharing an arbitrary Bell state and all intermediate observers performing some POVMs with parameter $\lambda$. The expressions of all postmeasurement states between any two observers are obtained, and their quantifications of Bell nonlocality, EPR steering and entanglement with different ranges of $\lambda$ are respectively detected and analysed.