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arXiv 2201.11790quant-phcond-mat.othercond-mat.quant-gascond-mat.stat-mech
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基于张量网络强化学习的自校正量子多体控制

Self-Correcting Quantum Many-Body Control using Reinforcement Learning with Tensor Networks

Friederike Metz, Marin Bukov

AI总结:

针对量子多体系统经典模拟难、最优控制协议设计难的问题,提出结合矩阵乘积态与强化学习的控制框架,可调控更大规模系统且具备泛化性与抗噪性,还映射为适配含噪声中等规模量子器件的混合算法并完成测试。

摘要:

量子多体控制是利用量子技术进程中的核心里程碑。然而,希尔伯特空间维度随量子比特数量呈指数增长,这使得经典模拟量子多体系统颇具挑战性,进而也难以设计出可靠且鲁棒的最优控制协议。本文提出了一种基于强化学习(RL)的高效调控量子多体系统的新型框架。我们通过利用矩阵乘积态来解决量子控制问题:其一,矩阵乘积态用于表示多体态;其二,它作为我们RL智能体可训练机器学习架构的组成部分。该框架被应用于制备量子伊辛链的基态,包括临界区域的态。它使我们能够调控的系统规模远大于仅采用神经网络架构所能支持的规模,同时保留了深度学习算法的优势,例如泛化能力以及可训练的抗噪声鲁棒性。具体而言,我们证明RL智能体能够找到通用控制策略,能够学习如何最优地调控此前未见过的多体态,还能够在量子动力学受到随机扰动时实时调整控制协议。此外,我们将QMPS框架映射为一种可在含噪声中等规模量子器件上运行的混合量子-经典算法,并在存在实验相关噪声源的条件下对其进行了测试。

英文摘要:

Quantum many-body control is a central milestone en route to harnessing quantum technologies. However, the exponential growth of the Hilbert space dimension with the number of qubits makes it challenging to classically simulate quantum many-body systems and consequently, to devise reliable and robust optimal control protocols. Here, we present a novel framework for efficiently controlling quantum many-body systems based on reinforcement learning (RL). We tackle the quantum control problem by leveraging matrix product states (i) for representing the many-body state and, (ii) as part of the trainable machine learning architecture for our RL agent. The framework is applied to prepare ground states of the quantum Ising chain, including states in the critical region. It allows us to control systems far larger than neural-network-only architectures permit, while retaining the advantages of deep learning algorithms, such as generalizability and trainable robustness to noise. In particular, we demonstrate that RL agents are capable of finding universal controls, of learning how to optimally steer previously unseen many-body states, and of adapting control protocols on-the-fly when the quantum dynamics is subject to stochastic perturbations. Furthermore, we map the QMPS framework to a hybrid quantum-classical algorithm that can be performed on noisy intermediate-scale quantum devices and test it under the presence of experimentally relevant sources of noise.

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。

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