论文标题
有效校正多Quibit测量误差
Efficient correction of multiqubit measurement errors
论文作者
论文摘要
状态准备和测量（垃圾邮件）错误限制了近期量子计算机的性能及其实际应用的潜力。垃圾邮件错误是在需要的校准步骤之后部分纠正的，该步骤需要在$ n $ Qubits的寄存器上进行完整实现，并进行$ 2^n $附加的测量。在这里，我们引入了一种大概但有效的方法，用于多Qubit垃圾邮件错误表征和缓解，需要经典的处理$ 2^n \！ \ times 2^n $矩阵，但只有$ o（4^k n^2）$测量，其中$ k = o（1）$是相关量中的量子数。我们使用IBM Q处理器在4和8个超导量子的寄存器上演示和验证该技术。
State preparation and measurement (SPAM) errors limit the performance of near-term quantum computers and their potential for practical application. SPAM errors are partly correctable after a calibration step that requires, for a complete implementation on a register of $n$ qubits, $2^n$ additional measurements. Here we introduce an approximate but efficient method for multiqubit SPAM error characterization and mitigation requiring the classical processing of $2^n \! \times 2^n$ matrices, but only $O(4^k n^2)$ measurements, where $k=O(1)$ is the number of qubits in a correlation volume. We demonstrate and validate the technique using an IBM Q processor on registers of 4 and 8 superconducting qubits.
