Taylor, J. M.Dür, W.Zoller, P.Yacoby, A.Marcus, C. M.Lukin, M. D.2019-09-272005Taylor, J. M., W. Dür, P. Zoller, A. Yacoby, C. M. Marcus, and M. D. Lukin. 2005. “Solid-State Circuit for Spin Entanglement Generation and Purification.” Physical Review Letters 94 (23). https://doi.org/10.1103/physrevlett.94.236803.0031-90071079-71141092-0145http://nrs.harvard.edu/urn-3:HUL.InstRepos:41417298We 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.en-USJournal Article2019-09-2710.1103/PhysRevLett.94.236803