A QND-based Toffoli gate for polarization qubits and its applications

We present an optical apparatus for polarization qubits based on quantum nondemolition measurement (QND) that has a probability of success of 0.95 considering real active devices. This apparatus can implement multiqubit Toffoli gates, reversible AND/NANDs, and Peres gates.

Automated summary

We propose an optical apparatus that utilizes quantum nondemolition measurement (QND) for polarization qubits, achieving a success probability of 0.95 with real active devices. This apparatus is capable of implementing multiqubit Toffoli gates, reversible AND/NAND gates, and Peres gates.