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We propose an all optical quantum computation scheme, with trapped electronspin qubits, using their Coulomb exchange interaction with optically excitedmicrocavity exciton-polaritons. This paper describes a single qubit rotation,which together with two-qubit controlled-z gate presented in PRB 85, 241403(R)(2012), form a set of universal logic gates. The errors due to finite cavitylifetime and incorrect orientation of the rotation axis are minimized byoptimizing pump pulse parameters. With projective homodyne phase measurementand initialization, our scheme is a promising candidate for the physicalrealization of a universal quantum computer.

Towards All Optical, Universal Quantum Computation using Trapped Electron Spins and Cavity Polariton Resonance