Geometric Bell-like inequalities for steering

Understand

Many of the standard Bell inequalities (e.g., CHSH) are not effective for detection of quantum correlations which allow for steering, because for a wide range of such correlations they are not violated.

• We present Bell-like inequalities which have lower bounds for non-steering correlations than for local causal models.
• The inequalities involve all possible measurement settings at each side.
• We arrive at interesting and elegant conditions for steerability of arbitrary two-qubit states.