Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, 230026, People's Republic of China.
Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China, Hefei, 230026, People's Republic of China.
Sci Rep. 2016 Sep 16;6:33381. doi: 10.1038/srep33381.
The Kibble-Zurek mechanism is the paradigm to account for the nonadiabatic dynamics of a system across a continuous phase transition. Its study in the quantum regime is hindered by the requisite of ground state cooling. We report the experimental quantum simulation of critical dynamics in the transverse-field Ising model by a set of Landau-Zener crossings in pseudo-momentum space, that can be probed with high accuracy using a single trapped ion. We test the Kibble-Zurek mechanism in the quantum regime in the momentum space and find the measured scaling of excitations is in accordance with the theoretical prediction.
Kibble-Zurek 机制是解释系统在连续相变过程中非绝热动力学的范例。在量子领域对其进行研究受到基态冷却的限制。我们通过一组赝动量空间中的 Landau-Zener 交叉实验实现了横向场伊辛模型的临界动力学的量子模拟，这可以使用单个囚禁离子进行高精度探测。我们在动量空间中对量子 Kibble-Zurek 机制进行了测试，发现测量的激发的标度与理论预测相符。
