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Nonlinear steering criteria for arbitrary two-qubit quantum systems
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By employing Pauli measurements, we present some nonlinear steering criteria applicable for arbitrary two-qubit quantum systems and optimized ones for symmetric quantum states. These criteria provide sufficient conditions to witness steering, which can recover the previous elegant results for some well-known states. Compared with the existing linear steering criterion and entropic criterion, ours can certify more steerable states without selecting measurement settings or correlation weights, which can also be used to verify entanglement as all steerable quantum states are entangled.
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Symmetric quantum states: a review of recent progress
A comprehensive review of symmetric multipartite quantum states, covering their mathematical structure, entanglement and nonlocality, verification, metrology uses, quantum error correction, and experimental generation.
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