Clock transitions generated by defects in silica glass

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-12-17 DOI:10.1063/5.0239469

Brendan C. Sheehan, Guanchu Chen, Jonathan R. Friedman

引用次数: 0

Abstract

Clock transitions (CTs) in spin systems, which occur at avoided level crossings, enhance quantum coherence lifetimes T2 because the transition becomes immune to the decohering effects of magnetic field fluctuations to first order. We present the first electron-spin resonance characterization of CTs in certain defect-rich silica glasses, noting coherence times up to 16 μs at the CTs. We find CT behavior at zero magnetic field in borosilicate and aluminosilicate glasses, but not in a variety of silica glasses lacking boron or aluminum. Annealing reduces or eliminates the zero-field signal. Since boron and aluminum have the same valence and are acceptors when substituted for silicon, we suggest the observed CT behavior could be generated by a spin-1 boron vacancy center within the borosilicate glass, and similarly, an aluminum vacancy center in the aluminosilicate glass.

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石英玻璃缺陷引起的时钟跃迁

自旋系统中的时钟转换（CT）发生在避免的电平交叉点上，可提高量子相干寿命 T2，因为这种转换不受磁场波动的一阶去耦效应的影响。我们首次对某些富缺陷硅玻璃中的 CT 进行了电子自旋共振表征，发现 CT 的相干时间可达 16 μs。我们在硼硅玻璃和铝硅酸盐玻璃中发现了零磁场下的 CT 行为，但在多种缺硼或缺铝的硅玻璃中却没有发现。退火可减少或消除零磁场信号。由于硼和铝具有相同的价态，并且在取代硅时是受体，我们认为观察到的 CT 行为可能是由硼硅玻璃中的自旋-1 硼空位中心产生的，同样，铝硅酸盐玻璃中的铝空位中心也会产生 CT 行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.