Loss-tolerant operations in parity-code linear optics quantum computing

Abstract

A heavy focus for optical quantum computing is the introduction of error correction, and the minimization of resource requirements. We detail a complete encoding and manipulation scheme designed for circuit-model linear optics quantum computing, incorporating scalable operations and loss-tolerant architecture. We also calculate loss thresholds for the gate systems described, with an efficiency of $83%$ required for the single-qubit operations, and $90%$ for the two-qubit controlled-NOT gate.