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arXiv 2201.12330quant-ph
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基于耗散工程的非幺正门运算

Nonunitary Gate Operations by Dissipation Engineering

E. Zapusek, A. Javadi, F. Reiter

摘要:

不可逆逻辑与幺正量子演化不一致。通过经典测量来模拟这样的操作可能导致干扰和高资源需求。为了克服这些限制,我们提出了利用耗散实现不可逆门操作所需的非酉进化的协议。使用额外的受衰减的激发态,我们工程师有效的衰变过程,执行所需的门操作的最小稳定的希尔伯特空间。这些系统以确定性和自主方式运行,无需测量。我们讨论我们的方法考虑几个经典的逻辑运算,如或,或非,异或门。对于实验实现,我们讨论了一种可能的实现量子点。我们的研究表明,不可逆的逻辑操作可以有效地进行现实的量子系统和耗散工程是一个重要的工具,获得非幺正演化。所提出的操作扩展了量子工程师的工具箱,并在NISQ算法和量子机器学习中有很好的应用。

英文摘要:

Irreversible logic is at odds with unitary quantum evolution. Emulating such operations by classical measurements can result in disturbances and high resource demands. To overcome these limitations, we propose protocols that harness dissipation to realize the nonunitary evolution required for irreversible gate operations. Using additional excited states subject to decay, we engineer effective decay processes that perform the desired gate operations on the smallest stable Hilbert space. These operate deterministically and in an autonomous fashion, without the need for measurements. We exemplify our approach considering several classical logic operations, such as the OR, NOR, and XOR gates. Towards experimental realization, we discuss a possible implementation in quantum dots. Our study shows that irreversible logic operations can be efficiently performed on realistic quantum systems and that dissipation engineering is an essential tool for obtaining nonunitary evolutions. The proposed operations expand the quantum engineers' toolbox and have promising applications in NISQ algorithms and quantum machine learning.

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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