  We propose a Bell measurement free scheme to implement a quantum repeater in
GaAs/AlGa double qunatum dot systems.we prove the four pairs of double quantum
dots compose an entanglement unit, given the the initial state is singlet
states. Our shceme differs from the famous Duan-Lukin-Cirac-zoller(DLCZ)
protocol in that Bell measurements are unneccessary for the entanglement
swapping,which provides great advantages and conveniences in experimental
implementaion. Our scheme significantly improve the success probability of
quantum repeaters based on solid state quantum devices.
