论文标题
使用SZ.-NAGY扩张算法在NMR量子处理器上模拟开放量子动力学
Simulating open quantum dynamics on an NMR quantum processor using the Sz.-Nagy dilation algorithm
论文作者
论文摘要
我们通过实验实现SZ.-NAGY扩张算法，以模拟核磁共振（NMR）量子处理器上的开放量子动力学。 SZ.-NAGY算法仅使用单个Ancilla量子量表，可以模拟任意开放量子系统的动力学。我们通过实验模拟了两个非单身过程的作用，即，在两个量子位上独立作用的相阻尼通道和作用于两个耦合核自旋1/2颗粒的集合的磁场梯度脉冲（MFGP）。为了评估实验模拟的量子过程的质量，我们执行基于凸优化的完整量子层析成像，以从实验数据中重建量子过程，并将其与要模拟的目标量子过程进行比较。
We experimentally implement the Sz.-Nagy dilation algorithm to simulate open quantum dynamics on an nuclear magnetic resonance (NMR) quantum processor. The Sz.-Nagy algorithm enables the simulation of the dynamics of arbitrary-dimensional open quantum systems, using only a single ancilla qubit. We experimentally simulate the action of two non-unitary processes, namely, a phase damping channel acting independently on two qubits and a magnetic field gradient pulse (MFGP) acting on an ensemble of two coupled nuclear spin-1/2 particles. To evaluate the quality of the experimentally simulated quantum process, we perform convex optimization-based full quantum process tomography to reconstruct the quantum process from the experimental data and compare it with the target quantum process to be simulated.
