Experimental verification of anti–Kibble-Zurek behavior in a quantum system under a noisy control field

The Kibble-Zurek (KZ) mechanism is a universal framework that can in principle describe nonequilibrium phase transition phenomena any system with the required symmetry properties. However, conflicting phenomenon termed anti-KZ behavior has been reported study of ferroelectric transitions, which slower driving results more topological defects [S. M. Griffin et al., Phys. Rev. X 2, 041022 (2012)]. Although this finding significant, related experimental work remains scarce. In work, we experimentally demonstrate under noisy control field three different quantum protocols using single trapped ${}^{171}{\mathrm{Yb}}^{+}$ ion. density studied as function quench time and noise intensity. We verify optimal to minimize excitations scales power law Our provides an verification two-level system.