2016/05/31 by Anirban Dutta, Armin Rahmani, Adolfo del Campo · 1 citation
Physics and Astronomy · #cond-mat.other #quant-ph
paper · pdf · doi:10.1103/physrevlett.117.080402
published as Phys. Rev. Lett. 117, 080402 (2016) · 5 pages, 3 figures, 2 pages of supplemental material
arxiv created 2016/08/19 · arxiv updated 2016/08/23
We show that a thermally isolated system driven across a quantum phase transition by a noisy control field exhibits anti-Kibble-Zurek behavior, whereby slower driving results in higher excitations. We characterize the density of excitations as a function of the ramping rate and the noise strength. The optimal driving time to minimize excitations is shown to scale as a universal power law of the noise strength. Our findings reveal the limitations of adiabatic protocols such as quantum annealing and demonstrate the universality of the optimal ramping rate.