Verification of a Many-Ion Simulator of the Dicke Model Through Slow Quenches across a Phase Transition
Verification of a Many-Ion Simulator of the Dicke Model Through Slow Quenches across a Phase Transition
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DOI：
10.1103/physrevlett.121.040503
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发表时间：
2018-07-27
影响因子：
8.6
通讯作者：
Bollinger, J. J.
中科院分区：
文献类型：
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作者：
Safavi-Naini, A.;Lewis-Swan, R. J.;Bollinger, J. J.
在外加横场的作用下，我们使用了一个类似于70个离子的自组装二维库仑晶体来模拟Dicke哈密顿量，Dicke哈密顿量是量子光学中的一个标志性模型，它的特征是超辐射(铁磁)和正常(顺磁)相之间的量子相变。我们在实验上实现了跨越量子临界点的慢猝灭，并通过大量的理论和实验比较对模拟器的动力学和性能进行了基准测试，结果显示出很好的一致性。在完全可控的囚禁离子阵列中实现Dicke模型可以为产生高纠缠态开辟了一条途径，这对改进计量学和观察多体系统中的扰乱和量子混沌是有用的。
We use a self-assembled two-dimensional Coulomb crystal of similar to 70 ions in the presence of an external transverse field to engineer a simulator of the Dicke Hamiltonian, an iconic model in quantum optics which features a quantum phase transition between a superradiant (ferromagnetic) and a normal (paramagnetic) phase. We experimentally implement slow quenches across the quantum critical point and benchmark the dynamics and the performance of the simulator through extensive theory-experiment comparisons which show excellent agreement. The implementation of the Dicke model in fully controllable trapped ion arrays can open a path for the generation of highly entangled states useful for enhanced metrology and the observation of scrambling and quantum chaos in a many-body system.