  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.
