Quantum optical CNOT gate

摘要

A nondeterministic quantum CNOT gate ( 10 ) for photon qubits, with success probability 1/9, uses beamsplitters (B 1 -B 5 ) with selected reflectivities to mix control and target input modes. It may be combined with an atomic quantum memory to construct a deterministic CNOT gate, with applications in quantum computing and as a Bell-state analyser.