Exploring More-Coherent Quantum Annealing

S. Novikov, R. Hinkey, S. Disseler, J. Basham, T. Albash, A. Risinger, D. Ferguson, Daniel A. Lidar, K. Zick
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引用次数: 28

Abstract

In the quest to reboot computing, quantum annealing (QA) is an interesting candidate for a new capability. While it has not demonstrated an advantage over classical computing on a real-world application, many important regions of the QA design space have yet to be explored. In IARPA's Quantum Enhanced Optimization (QEO) program, we have opened some new lines of inquiry to get to the heart of QA, and are designing testbed superconducting circuits and conducting key experiments. In this paper, we discuss recent experimental progress related to one of the key design dimensions: qubit coherence. Using MIT Lincoln Laboratory's qubit fabrication process and extending recent progress in flux qubits, we are implementing and measuring QA-capable flux qubits. Achieving high coherence in a QA context presents significant new engineering challenges. We report on techniques and preliminary measurement results addressing two of the challenges: crosstalk calibration and qubit readout. This groundwork enables exploration of other promising features and provides a path to understanding the physics and the viability of quantum annealing as a computing resource.
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探索更相干的量子退火
在重新启动计算的过程中,量子退火(QA)是一种有趣的新功能候选。虽然在现实世界的应用中,它还没有证明比经典计算更有优势,但QA设计领域的许多重要领域还有待探索。在IARPA的量子增强优化(QEO)计划中,我们已经开辟了一些新的研究路线,以达到QA的核心,并正在设计试验台超导电路和进行关键实验。在本文中,我们讨论了与关键设计维度之一:量子比特相干性相关的最新实验进展。利用麻省理工学院林肯实验室的量子位制造工艺和扩展通量量子位的最新进展,我们正在实施和测量具有qa能力的通量量子位。在QA环境中实现高一致性提出了重大的新工程挑战。我们报告了解决两个挑战的技术和初步测量结果:串扰校准和量子位读出。这个基础可以探索其他有前途的特性,并为理解量子退火作为计算资源的物理和可行性提供了一条途径。
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