论文标题
没有状态准备的现场理论的量子模拟
Quantum Simulation of Field Theories Without State Preparation
论文作者
论文摘要
我们提出了一种用于使用量子处理器计算实时可观察物的算法，同时避免需要准备完整的量子状态。量子资源的减少是通过使用标准晶格场理论在假想时间中的经典采样配置来实现的。然后可以将这些配置传递给量子处理器以进行时间进化。此方法遇到了我们表征的信号到噪声问题，我们演示了标准晶格QCD方法来减轻它的应用。
We propose an algorithm for computing real-time observables using a quantum processor while avoiding the need to prepare the full quantum state. This reduction in quantum resources is achieved by classically sampling configurations in imaginary-time using standard lattice field theory. These configurations can then be passed to quantum processor for time-evolution. This method encounters a signal-to-noise problem which we characterize, and we demonstrate the application of standard lattice QCD methods to mitigate it.
