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Quantum Computing in the Presence of Detected Spontaneous Emission

K. Khodjasteh, D. A. Lidar

quant-pharXiv:quant-ph/0301105

Abstract

A new method for quantum computation in the presence of detected spontaneous emission is proposed. The method combines strong and fast (dynamical decoupling) pulses and a quantum error correcting code that encodes n logical qubits into only n+1 physical qubits. Universal fault-tolerant quantum computation is shown to be possible in this scheme using Hamiltonians relevant to a range of promising proposals for the physical implementation of quantum computers.

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