  We describe a protocol to entangle two qubits at a distance by using
resonance fluorescence. The scheme makes use of the postselection of large and
distinguishable fluorescence signals corresponding to entangled and unentangled
qubit states and has the merits of both high success probability and high
entanglement fidelity owing to the multiphoton nature. Our result shows that
the entanglement generation is robust against photon fluctuations in the
fluorescence signals for a wide range of driving fields. We also demonstrate
that this new protocol has an average entanglement duration within the
decoherence time of corresponding qubit systems, based on current experimental
photon efficiency.
