论文标题
在状态预先计算和测定错误下的直接状态测量
Direct state measurements under state-preparation-and-measurement errors
论文作者
论文摘要
直接状态测量（DSM）是一种断层扫描方法，允许直接检索量子状态的波函数。但是，目前关于DSM的研究的缺点是，它不能提供访问嘈杂的量子系统。在这里，我们试图通过研究经历状态准备和测定（SPAM）错误的DSM测量精度来填补空白。我们通过各种配置来操纵一个量子控制的测量框架，并比较它们之间的效率。在这样的垃圾邮件错误下，要测量的状态会轻轻偏离真实状态，而选择后过程中的测量误差导致层析成像的准确性较差。我们的研究可以为垃圾邮件错误层析成像提供可靠的工具，并有助于理解和解决对当前量子技术的紧急需求。
Direct state measurement (DSM) is a tomography method that allows for retrieving quantum states' wave functions directly. However, a shortcoming of current studies on the DSM is that it does not provide access to noisy quantum systems. Here, we attempt to fill the gap by investigating the DSM measurement precision that undergoes the state-preparation-and-measurement (SPAM) errors. We manipulate a quantum controlled measurement framework with various configurations and compare the efficiency between them. Under such SPAM errors, the state to be measured lightly deviates from the true state, and the measurement error in the postselection process results in less accurate in the tomography. Our study could provide a reliable tool for SPAM errors tomography and contribute to understanding and resolving an urgent demand for current quantum technologies.
