论文标题
量子信息传播背后的准整体波动定理
Quasiprobability fluctuation theorem behind the spread of quantum information
论文作者
论文摘要
信息及时传播。例如，当将系统与第三方（例如环境）相关的系统相关联时，相关性会消散。这个简单但重要的事实构成了已知的量子数据处理不平等。从理论上讲，我们在这里揭示了量子信息不平等背后的量子波动定理。波动定理定量预测了潜在的随机量子过程的统计数据。为了完全捕获量子性质，此处建立的波动定理扩展到了准稳定性方案。我们还在实验上采用了一种基于干扰的方法来测量组成准方法的幅度，并通过IBM量子计算机验证我们已建立的波动定理。
Information spreads in time. For example, correlations dissipate when the correlated system locally couples to a third party, such as the environment. This simple but important fact forms the known quantum data-processing inequality. Here we theoretically uncover the quantum fluctuation theorem behind the quantum informational inequality. The fluctuation theorem quantitatively predicts the statistics of the underlying stochastic quantum process. To fully capture the quantum nature, the fluctuation theorem established here is extended to the quasiprobability regime. We also experimentally apply an interference-based method to measure the amplitudes composing the quasiprobability and verify our established fluctuation theorem by the IBM quantum computer.
