Experimental Trapped-ion Quantum Simulation of the Kibble-Zurek dynamics in momentum space.
Experimental Trapped-ion Quantum Simulation of the Kibble-Zurek dynamics in momentum space.
复制标题
动量空间中 Kibble-Zurek 动力学的实验俘获离子量子模拟
DOI：
10.1038/srep33381
复制
发表时间：
2016-09-16
影响因子：
4.6
通讯作者：
Guo GC
中科院分区：
文献类型：
--
作者：
Cui JM;Huang YF;Wang Z;Cao DY;Wang J;Lv WM;Luo L;Del Campo A;Han YJ;Li CF;Guo GC
Kibble-Zurek机制是解释系统在连续相变过程中的非绝热动力学的范式。基态冷却的要求阻碍了它在量子领域的研究。我们报告的实验量子模拟临界动力学的横向场伊辛模型的一组朗道-齐纳交叉在伪动量空间，可以探测到高精度使用一个单一的被困离子。我们在动量空间的量子态下对Kibble-Zurek机制进行了测试，发现测量到的激发标度与理论预测一致。
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.