Large-scale quantum computation in an anharmonic linear ion trap G.-D. Lin, S.-L. Zhu, R. Islam, K. Kim, M.-S. Chang, S. Korenblit, C. Monroe and L.-M. Duan EPL, 86 6 (2009) 60004 Published online: 09 July 2009 DOI: 10.1209/0295-5075/86/60004