Quantum Divide and Compute: Hardware Demonstrations and Noisy Simulations
Quantum Divide and Compute: Hardware Demonstrations and Noisy Simulations
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量子除法和计算：硬件演示和噪声模拟
DOI：
10.1109/isvlsi49217.2020.00034
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Martin Suchara
中科院分区：
文献类型：
--
作者：
T. Ayral;François;Zain Saleem;Y. Alexeev;Martin Suchara
有噪音的中等规模的量子计算机在量子比特数(电路“宽度”)和退相干时间(电路“深度”)方面存在内在限制。在这里，我们第一次演示了最近引入的一种方法，该方法将电路分解为更小的子电路或片段，从而使运行对于给定的量子处理器来说太宽或太深的电路成为可能。我们研究了该方法在IBM的一个具有不同数量的量子比特和碎片的20量子比特超导量子处理器上的行为。我们建立噪声模型来捕捉这个特定处理器的退相干、读出误差和门缺陷。然后，我们对该方法进行了噪声模拟，以解释观察到的实验结果。我们发现实验和模拟的成功概率之间的一致性在20%以内，并且我们观察到，重组噪声片段产生的总体结果可以超过没有碎片的结果。
Noisy, intermediate-scale quantum computers comewith intrinsic limitations in terms of the number of qubits (circuit "width") and decoherence time (circuit "depth") they can have. Here, for the first time, we demonstrate a recently introduced method that breaks a circuit into smaller subcircuits or fragments, and thus makes it possible to run circuits that are either too wide or too deep for a given quantum processor. We investigate the behavior of the method on one of IBM's 20-qubit superconducting quantum processors with various numbers of qubits and fragments. We build noise models that capture decoherence, readout error, and gate imperfections for this particular processor. We then carry out noisy simulations of the method in order to account for the observed experimental results. We find an agreement within 20% between the experimental and the simulated success probabilities, and we observe that recombining noisy fragments yields overall results that can outperform the results without fragmentation.
影响因子：
6.4
作者：
Preskill, John
通讯作者：
Preskill, John