Quantum computing in the presence of spontaneous emission by a combined dynamical decoupling and quantum-error-correction strategy
Kaveh Khodjasteh, Daniel A. Lidar · Physical Review A · 2003
A method for quantum computation in the presence of 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.