Tunable self-Kerr nonlinearity with voltage sensing in double quantum dot system Yandong Peng, Aihong Yang, Lin Jiang, Lihua Meng and Jing Liu Eur. Phys. J. D, 68 6 (2014) 152 Published online: 23 June 2014 DOI: 10.1140/epjd/e2014-50163-x