Nonlinear steering criteria for arbitrary two-qubit quantum systems

• URL: http://arxiv.org/abs/2010.00083v1
• Date: Wed, 30 Sep 2020 19:57:37 GMT
• Title: Nonlinear steering criteria for arbitrary two-qubit quantum systems
• Authors: Guo-Zhu Pan, Ming Yang, Hao Yuan, Gang Zhang, and Jun-Long Zhao
• Abstract summary: We present some nonlinear steering criteria applicable for arbitrary two-qubit quantum systems and optimized ones for symmetric quantum states. Compared with the existing linear steering criterion and entropic criterion, ours can certify more steerable states without selecting measurement settings or correlation weights.
• Score: 16.20946947543463
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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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