Maurer, P. C.; Maze, J. R.; Stanwix, P. L.; Jiang, L.; Gorshkov, A. V.; Zibrov, A. A.; Harke, B.; Hodges, J. S.; Zibrov, A. S.; Yacoby, A.; Twitchen, D.; Hell, S. W.; Walsworth, Ronald L.; Lukin, M. D.
(2010)
A fundamental limit to existing optical techniques for measurementand manipulation of spin degrees of freedom is set by diffraction, which does not allow spins separated by less than about a quarter of a micrometre to be ...