TY - JOUR T1 - Solid-state circuit for spin entanglement generation and purification JF - Physical Review Letters Y1 - 2005 A1 - J. M. Taylor A1 - W. Dür A1 - P. Zoller A1 - A. Yacoby A1 - C. M. Marcus A1 - M. D. Lukin AB - We show how realistic charge manipulation and measurement techniques, combined with the exchange interaction, allow for the robust generation and purification of four-particle spin entangled states in electrically controlled semiconductor quantum dots. The generated states are immunized to the dominant sources of noise via a dynamical decoherence-free subspace; all additional errors are corrected by a purification protocol. This approach may find application in quantum computation, communication, and metrology. VL - 94 UR - http://arxiv.org/abs/cond-mat/0503255v2 CP - 23 J1 - Phys. Rev. Lett. U5 - 10.1103/PhysRevLett.94.236803 ER -