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.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1103/PhysRevLett.117.080402 | DOI Listing |
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!