论文标题
NMR量子处理器上PT对称性汉密尔顿的量子相干性动力学的实验证明
Experimental demonstration of the dynamics of quantum coherence evolving under a PT-symmetric Hamiltonian on an NMR quantum processor
论文作者
论文摘要
在这项工作中，我们研究了在最大的纠结的两部分和三方状态下的局部PT-对称性汉密尔顿人的量子相干性（总相干性，全球相干性和局部连贯性）的动力学。我们的结果表明，两分状态的量子相干性在PT-对称性汉密尔顿的不间断相位状态下振荡。有趣的是，在破碎的阶段制度中，尽管全球连贯性呈指数衰减，但本地和总的连贯性进入了一个“冻结”制度，随着时间的推移，他们获得了稳定的价值。在最大纠缠的三方状态下，观察到类似的模式，而整个纠缠的三方状态和局部相干的动力学，而在该状态下的全局连贯性的动力学与两部分状态的动力学不同。这些结果在三Q量的核磁共振（NMR）量子处理器上对最大纠缠的两分状状态进行了实验验证，其中一个量子位充当Ancilla。实验结果与理论预测非常匹配，直到实验误差。
In this work, we study the dynamics of quantum coherence (total coherence, global coherence and local coherence) evolving under a local PT-symmetric Hamiltonian in maximally entangled bipartite and tripartite states. Our results indicate that quantum coherence in the bipartite state oscillates in the unbroken phase regime of the PT-symmetric Hamiltonian. Interestingly, in the broken phase regime, while the global coherence decays exponentially, the local and total coherences enter a 'freezing' regime where they attain a stable value over time. A similar pattern is observed for the dynamics of total and local coherences in the maximally entangled tripartite state, while the dynamics of global coherence in this state differs from that of the bipartite state. These results were experimentally validated for a maximally entangled bipartite state on a three-qubit nuclear magnetic resonance (NMR) quantum processor, with one of the qubits acting as an ancilla. The experimental results match well with the theoretical predictions, upto experimental errors.
