Wang and Brady Reply

We thank Ikeda, Berthier, and Sollich (IBS) [1] for their comments which question our interpretation of the universal viscosity divergence near the flow-arrest transition in constant stress and pressure rheology of hard-sphere colloidal suspensions [2]. IBS introduced two Péclet numbers: Pe_0 = γa^2/d^0 and Pe = γa^2/d(ϕ), with γ the strain rate, a the particle size, d_0 the isolated single-particle diffusivity, and d(ϕ) the long-time at-rest self-diffusivity. And they considered three regimes: (i) Pe_0 < Pe ≪ 1, (ii) Pe_0 ≪ 1 ≪ Pe, and (iii) 1 ≪ Pe_0 < Pe.