An effective method for polarising antiprotons
  There exists an inconsistency in the value of the kinetic energies of the antiproton in the electron laboratory reference frame and of the electron in the antiproton laboratory reference frame taken wrongly both as 0.65 keV (see figure 1 and table 2) of the paper. The consequence of this mistake is that the relative velocity of the electron is not -0.0504 (see table 2) but -0.00118, i.e. a factor of \sqrt{m_{electron}/m_{proton}} = 1/43 smaller. The consequence of this factor is that the relative velocity \beta_{relative} in eq. (27) and \kappa are smaller by this factor. This means that the time for polarisation build-up is longer by a factor 43. Though the principle idea is not put into question, the method is not effective "with todays technology" and we have to withdraw the paper and the proposal. 
Th. Walcher, H. Arenh\"ovel, K. Aulenbacher, R. Barday, and A.   Jankowiak