Cavity-driven Rabi oscillations between Rydberg states of atoms trapped on a superconducting atom chip

Kaiser, Manuel; Glaser, Conny; Ley, Li Yuan; Grimmel, Jens; Hattermann, Helge; Bothner, Daniel; Koelle, D.; Kleiner, R.; Petrosyan, David; Günther, Andreas; Fortágh, József

doi:10.1103/physrevresearch.4.013207

Cited by 15 publications

(5 citation statements)

References 52 publications

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“…Bernon等 [19] 实验实现超导共面波导腔芯片表面的冷原子囚禁和相干性测量, 当原子团距离芯片表面为60, 25与14 μm时, 其相干时间分别为20. 研究组图宾根大学 [20] 图宾根大学 [21] 伦敦大学 [22] 华南师大 4 微波光波相干转换高效宽带低噪微波光波相干转换是通过光纤将超导量子计算机互联的关键技术. 目前人们已在很多量子体系开展了微波光波相干转换的研究 [14,15] , 如光力电转换器 [23−25] 、电光转换器 [26,27] 、原子系综转换器 [28−31] 、稀土掺杂晶体转换器 [32] 、铁磁系统转换器 [33] 等 .…”

Section: 的线宽unclassified

Research progress of superconductor and cold atoms hybrid quantum system

Lv,

Li,

et al. 2023

Acta Phys. Sin.

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The superconductor and cold atoms hybrid quantum system is poised to realize fast quantum gates, long-life quantum storage and long-distance transmission through optical fibers, making it one of the most promising hybrid quantum systems for achieving optical interconnection between two superconducting quantum computers. This paper provides a comprehensive review of recent research advancements in the optical interconnection of two superconducting quantum computers, based on the superconductor and cold atoms hybrid quantum system. This encompasses the coherent coupling between superconducting chips and cold atoms, the coherent microwave-to-optics conversion, and the long-range microwave interconnection between superconducting qubits and quantum converters. The system is expected to provide a physical and technical foundation for practical optical-fiber interconnection of two superconducting quantum computers, and have broad applications in distributed superconducting quantum computation and hybrid quantum networks.

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Section: 的线宽unclassified

Research progress of superconductor and cold atoms hybrid quantum system

Lv,

Li,

et al. 2023

Acta Phys. Sin.

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“…To maximize atom-resonator coupling at this type of hybrid quantum interface and move toward the single-photon strongcoupling regime, it is desirable to minimize the distance of the atoms from the CPW resonator structures and hence the superconducting chip surfaces. However, in close proximity to cryogenically cooled surfaces, it remains challenging to completely cancel stray electric fields [15,[17][18][19][20]. Residual uncancelled inhomogeneous electric fields ultimately cause dephasing and limit coherence times.…”

Section: Introductionmentioning

confidence: 99%

“…Residual uncancelled inhomogeneous electric fields ultimately cause dephasing and limit coherence times. Therefore, in addition to choosing Rydberg-Rydberg transitions with low sensitivity to these fields [16,20,21], it is desirable to engineer the corresponding states to further minimize dc Stark shifts. This quantum state engineering can, for example, be achieved by dressing an atom with appropriate off-resonant radiofrequency or microwave fields as proposed, and subsequently demonstrated in experiments with rubidium atoms for a range of Rydberg states [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Tunable Rydberg–Rydberg transitions in helium with reduced sensitivity to dc electric fields by two-colour microwave dressing

Brown,

Hogan

2023

J. Phys. B: At. Mol. Opt. Phys.

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The difference in the static electric dipole polarisabilities of the $1\mathrm{s}55\mathrm{s}\,^3\mathrm{S}_1$ and $1\mathrm{s}56\mathrm{s}\,^3\mathrm{S}_1 $ Rydberg levels in helium has been eliminated by dressing the atom with a microwave field near resonant with the single-photon $1\mathrm{s}55\mathrm{s}\,^3\mathrm{S}_1 \rightarrow 1\mathrm{s}55\mathrm{p}\,^3\mathrm{P}_J$ transition. For an $2.82~\mathrm{mV}\,\mathrm{cm}^{-1}$ amplitude dressing field, detuned by $2\pi\times10~\mathrm{MHz}$ from the zero-field $1\mathrm{s}55\mathrm{s}\,^3\mathrm{S}_1 \rightarrow 1\mathrm{s}55\mathrm{p}\,^3\mathrm{P}_2$ transition frequency, the dc Stark shift of the two-photon $1\mathrm{s}55\mathrm{s}\,^3\mathrm{S}_1 \rightarrow 1\mathrm{s}56\mathrm{s}\,^3\mathrm{S}_1 $ transition between these states \hl{remained within $\pm 15~\mathrm{kHz}$} for electric fields \hl{up to $\sim60~\mathrm{mV}\,\mathrm{cm}^{-1}$}. This transition was probed by single-colour two-photon microwave spectroscopy, and by two-colour two-photon spectroscopy with one strong additional dressing field and a weak probe field. For all measurements, the transition frequencies and Stark shifts were compared, and found to be in excellent quantitative agreement with the results of Floquet calculations of the energy-level structure of the Rydberg states in the presence of the dressing fields and applied dc electric fields. The two-colour microwave dressing scheme demonstrated, with one field applied to null the differential polarisability of the Rydberg-Rydberg transition, and the second exploited to allow the two-photon transition to be employed to achieve tunable absorption of single-photons from a weak probe field, will facilitate improved coherence times and tunable single-photon absorption in hybrid cavity QED experiments with Rydberg atoms and superconducting microwave circuits.

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“…However, in all of these examples large, often time-varying fields persist near the surfaces, with coherent Rydberg excitations closer than ∼ 90 µm to any surface proving difficult. Microwave-atom entanglement schemes depend on coupling Rydberg atoms to evanescent resonator fields [18,19] or to fields extended past the resonator surface [20]. In the former case, entering the strong-coupling regime requires atoms be placed within just a few µm of the resonator surface, in the latter example the requirement is relaxed to an atom-surface distance of ∼ 15 µm.…”

Section: Introductionmentioning

confidence: 99%

Reducing Rydberg polarizability by microwave dressing

Bohórquez¹,

Chinnarasu²,

Saffman³

2022

Preprint

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We demonstrate reduction of the dc polarizability of Cesium atom Rydberg states in a 77 K environment utilizing microwave field dressing. In particular we reduce the polarizability of 52P 3/2 states which have resonances at 5.35 GHz to 51D 5/2 , suitable for interfacing Rydberg atoms to superconducting resonators in a cryogenic environment. We measure the polarizability of the Rydberg states using Magneto-Optical-Trap (MOT) loss spectroscopy. Using an off-resonant radio-frequency (RF) dressing field coupling 52P 3/2 and 51D 5/2 we demonstrate a reduction in dc polarizability of the 52P 3/2 states over 80%. Experimental findings are in good agreement with a numerical model of the atom-dressing field system developed using the Shirley-Floquet formalism. We also demonstrate that the dc polarizability reduction is highly anisotropic, with near total nulling possible when the dc and dressing fields are aligned, but only a factor of two reduction in polarizability when the fields are orthogonal. These results may aid in stabilizing Rydberg resonances against varying dc fields present near surfaces, enabling advancement in the development of hybrid Rydberg atomsuperconducting resonator quantum gates.

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Cavity-driven Rabi oscillations between Rydberg states of atoms trapped on a superconducting atom chip

Cited by 15 publications

References 52 publications

Research progress of superconductor and cold atoms hybrid quantum system

Research progress of superconductor and cold atoms hybrid quantum system

Tunable Rydberg–Rydberg transitions in helium with reduced sensitivity to dc electric fields by two-colour microwave dressing

Reducing Rydberg polarizability by microwave dressing

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