Quantum steering in networks: Measurement-device-independent detection, continuous variables, and practical Gaussian schemes
The paper investigates certifying quantum steering in multipartite networks where most parties are untrusted. It shows that steering detection can be lifted to a Measurement-Device-Independent (MDI) regime, even for continuous variable systems. This means using only Gaussian operations and trusted inputs allows for experimentally feasible, minimal-trust certification beyond simple nonlocality tests.