Heisenberg-Type Quantum Steering by Continuous Weak Measurement in Circuit QED *

Zhong Wang

Fig. 4 (Color online) Bound of $S^{mnl}_{yzx}$ under different detector efficiencies $\eta$, which vary from 0.5 to 1.0. When $\eta<0.7$, the violation region disappears. Inset indicates the minimum of $S^{mnl}_{yzx}$ under different efficiencies.