Sample-to-sample torque fluctuations in a system of coaxial randomly charged surfaces Ali Naji, Jalal Sarabadani, David S. Dean and Rudolf Podgornik Eur. Phys. J. E, 35 3 (2012) 24 Published online: 29 March 2012 DOI: 10.1140/epje/i2012-12024-y