|Title||Validating and certifying stabilizer states|
|Publication Type||Journal Article|
|Year of Publication||2019|
|Authors||A. Kalev, A. Kyrillidis, and N. M. Linke|
|Journal||Phys. Rev. A|
|Date Published||APR 30|
|Type of Article||Article|
We propose a measurement scheme that validates the preparation of an n-qubit stabilizer state. The scheme involves a measurement of n Pauli observables, a priori determined from the stabilizer state and which can be realized using single-qubit gates. Based on the proposed validation scheme, we derive an explicit expression for the worst-case fidelity, i.e., the minimum fidelity between the stabilizer state and any other state consistent with the measured data. We also show that the worst-case fidelity can be certified, with high probability, using O(n(2)) copies of the state.