光学镊子中长寿命的碱土原子环形里德伯质子

IF 11.6 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Physical Review X Pub Date : 2024-05-03 DOI:10.1103/physrevx.14.021024
C. Hölzl, A. Götzelmann, E. Pultinevicius, M. Wirth, F. Meinert
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引用次数: 0

摘要

雷德贝格原子量子模拟器和计算机的相干时间和栅极保真度从根本上受到雷德贝格态寿命的限制。圆雷德贝格态具有最大角动量,可以有效防止衰变,因此很有希望在数量级上克服这一限制。我们首次在光镊中实现了碱土环状里德伯原子的捕获,其光学活性离子核心提供了独特而新颖的控制可能性。具体来说,我们展示了 Sr88 的超高 n(n=79)圆态的产生。我们测量了室温下长达 2.55 毫秒的寿命,这是通过空腔辅助抑制黑体辐射实现的。我们展示了对附近流形的圆环态编码的微波量子比特的相干控制,并通过拉姆齐和自旋回波光谱测定了量子比特的相干时间。最后,通过测量陷阱诱导的量子比特光偏移,量化了利用 Sr+ 内核极化性的圆态镊子陷阱。我们的工作开辟了利用二价原子的圆形雷德贝格态进行量子模拟的途径,利用了与光学活性核心离子相关的新兴工具箱。
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Long-Lived Circular Rydberg Qubits of Alkaline-Earth Atoms in Optical Tweezers
Coherence time and gate fidelities in Rydberg atom quantum simulators and computers are fundamentally limited by the Rydberg state lifetime. Circular Rydberg states are highly promising candidates to overcome this limitation by orders of magnitude, as they can be effectively protected from decay due to their maximum angular momentum. We report the first realization of alkaline-earth circular Rydberg atoms trapped in optical tweezers, which provide unique and novel control possibilities due to the optically active ionic core. Specifically, we demonstrate creation of very high-n (n=79) circular states of Sr88. We measure lifetimes as long as 2.55 ms at room temperature, which are achieved via cavity-assisted suppression of black-body radiation. We show coherent control of a microwave qubit encoded in circular states of nearby manifolds, and characterize the qubit coherence time via Ramsey and spin-echo spectroscopy. Finally, circular-state tweezer trapping exploiting the Sr+ core polarizability is quantified via measurements of the trap-induced light shift on the qubit. Our work opens routes for quantum simulations with circular Rydberg states of divalent atoms, exploiting the emergent toolbox associated with the optically active core ion.
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来源期刊
Physical Review X
Physical Review X PHYSICS, MULTIDISCIPLINARY-
CiteScore
24.60
自引率
1.60%
发文量
197
审稿时长
3 months
期刊介绍: Physical Review X (PRX) stands as an exclusively online, fully open-access journal, emphasizing innovation, quality, and enduring impact in the scientific content it disseminates. Devoted to showcasing a curated selection of papers from pure, applied, and interdisciplinary physics, PRX aims to feature work with the potential to shape current and future research while leaving a lasting and profound impact in their respective fields. Encompassing the entire spectrum of physics subject areas, PRX places a special focus on groundbreaking interdisciplinary research with broad-reaching influence.
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