Figure 1
From: Physical interpretation of nonlocal quantum correlation through local description of subsystems
Characterization of different nonlocal quantum correlations of the shared state \(\rho _{AB}\) in a single local-description model. Bob’s task is to characterize quantum correlations by the violations of the local-uncertainty relations. \(\text {LHS}_i^n\), \(i=1,2,3\), refers to different Bob’s strategies in different scenarios to verify nonlocal correlations including entanglement, steerability and Bell nonlocality. n is the number of measurement. Bob first asks Alice to minimize his uncertainty about the state of the system B by communicating \(N_i\)-cbits (classical bits) to Alice. Alice then measures the appropriate observable \({\mathcal {A}}_j\) on the system A and communicates the \(\{a,\,{\mathcal {A}}_j\}\) information back to Bob. Given the \(\{a,\,{\mathcal {A}}_j\}\) information, Bob checks the uncertainty of the state of his system B. If the certain local-uncertainty relation is violated as Eq.(2) shown, Bob confirms that the shared state \(\rho _{AB}\) is either entangled, steerable, or Bell nonlocal. The figure is taken form the source https://www.dreamstime.com/ and then it has been modified for the present scenarios.
