Optical generation of matter qubit graph states

摘要: We present a scheme for rapidly entangling matter qubits in order to create graph states one-way quantum computing. The can be simple three-level systems separate cavities. Coupling involves only local fields and static (unswitched) linear optics network. Fusion of graph-state sections occurs with, principle, zero probability damaging the nascent state. avoid finite thresholds other schemes by operating on two entangled pairs, so that each generates exactly one photon. do not require relatively slow single qubit flips applied during growth phase: state then become purely optical process. naturally with vertices high degree is easily able construct minimal states, consequent resource savings. most efficient approach will new edges even as elsewhere are measured, 'just time' approach. An error analysis indicates robust against imperfections apparatus.