Reversal of the Weak Measurement of a Quantum State in a Superconducting Phase Qubit
Reversal of the Weak Measurement of a Quantum State in a Superconducting Phase Qubit
We demonstrate in a superconducting qubit the conditional recovery (uncollapsing) of a quantum state after a partial-collapse measurement. A weak measurement extracts information and results in a nonunitary transformation of the qubit state. However, by adding a rotation and a second partial measurement with the same strength, we erase the …