arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.01760quant-phcond-mat.dis-nn
收藏

量子近似优化算法的经典变分模拟

Classical variational simulation of the Quantum Approximate Optimization Algorithm

Matija Medvidovic, Giuseppe Carleo

摘要:

量子计算中的一个关键的开放问题是量子算法是否可以潜在地提供比经典算法更大的优势来完成实际感兴趣的任务。理解经典计算在模拟量子系统中的局限性是解决这个问题的重要组成部分。我们介绍了一种方法来模拟分层量子线路组成的参数化门,一个架构背后的许多变分量子算法适用于近期的量子计算机。使用多量子位波函数的神经网络参数化,专注于量子近似优化算法(QAOA)的相关状态。对于模拟的最大电路,我们在4个QAOA层达到54个量子位,大约实现324个RZZ门和216个RX门,而不需要大规模的计算资源。对于较大的系统,我们的方法可以用来提供准确的QAOA模拟在以前未探索的参数值和基准的下一代实验中的噪声中间尺度量子(NISQ)时代。

英文摘要:

A key open question in quantum computing is whether quantum algorithms can potentially offer a significant advantage over classical algorithms for tasks of practical interest. Understanding the limits of classical computing in simulating quantum systems is an important component of addressing this question. We introduce a method to simulate layered quantum circuits consisting of parametrized gates, an architecture behind many variational quantum algorithms suitable for near-term quantum computers. A neural-network parametrization of the many-qubit wave function is used, focusing on states relevant for the Quantum Approximate Optimization Algorithm (QAOA). For the largest circuits simulated, we reach 54 qubits at 4 QAOA layers, approximately implementing 324 RZZ gates and 216 RX gates without requiring large-scale computational resources. For larger systems, our approach can be used to provide accurate QAOA simulations at previously unexplored parameter values and to benchmark the next generation of experiments in the Noisy Intermediate-Scale Quantum (NISQ) era.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑