Controlling stray electric fields on an atom chip for experiments on Rydberg atoms

Davtyan, D.; Machluf, Shimon; Soudijn, M. L.; Naber, J.; Druten, N. J. van; Heuvell, H. van Linden van den B.; Spreeuw, R. J. C.

doi:10.1103/physreva.97.023418

Cited by 9 publications

(6 citation statements)

References 33 publications

(45 reference statements)

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“…However, thus far coherent Rydberg physics on atom chips has been difficult to observe due to decoherence from inhomogeneous Stark shifts induced by stray electric fields emanating from the surface [31][32][33][34], which have also been observed and characterized close to a microwave waveguide [35], and using a chip in a cryogenic environment [36]. While first evidence of Rydberg-Rydberg interactions on an atom chip has been demonstrated under cryogenic circumstances as well [37], the saturation of Rydberg atom number could not be observed, and the excitation bandwidth was too large to probe the initial arXiv:1810.04532v2 [physics.atom-ph] 2 Jan 2019 coherence.…”

Section: Introductionmentioning

confidence: 99%

From coherent collective excitation to Rydberg blockade on an atom chip

et al. 2018

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Using time-resolved measurements, we demonstrate coherent collective Rydberg excitation crossing over into Rydberg blockade in a dense and ultracold gas trapped at a distance of 100 µm from a room-temperature atom chip. We perform Ramsey-type measurements to characterize the coherence. The experimental data are in good agreement with numerical results from a master equation using a mean-field approximation, and with results from a super-atom-based Hamiltonian. This represents significant progress in exploring a strongly interacting driven Rydberg gas on an atom chip.

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Section: Introductionmentioning

confidence: 99%

From coherent collective excitation to Rydberg blockade on an atom chip

et al. 2018

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“…Above field strengths of about 20 V/m the hyper-polarizability produces much larger Stark shifts in the dressed states than in the un-dressed states. This poses a significant challenge for near-surface experiments, but techniques from [13][14][15][16][17] can be used in conjunction with dressing to improve the stability of the Rydberg resonance. When approaching atom-surface distances < 100 µm, it may become necessary to use multi-frequency dressing to reduce the higher order polarizabilities, as proposed in [23,24].…”

Section: Discussionmentioning

confidence: 99%

“…A variety of methods to measure, reduce, and stabilize adsorbate-caused electric field noise have been demonstrated [13][14][15][16][17]. 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.…”

Section: Introductionmentioning

confidence: 99%

Reducing Rydberg polarizability by microwave dressing

Bohórquez¹,

Chinnarasu²,

Saffman³

2022

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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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“…Several experiments have demonstrated techniques to reduce these stray fields [26][27][28][29]. A dramatic reduction was achieved by depositing a thin film of metallic Rb in a cryogenic environment [29].…”

Section: Magnetic Fields Of Patterned Filmsmentioning

confidence: 99%

Designs of magnetic atom-trap lattices for quantum simulation experiments

2019

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We have designed and realized magnetic trapping geometries for ultracold atoms based on permanent magnetic films. Magnetic chip based experiments give a high level of control over trap barriers and geometric boundaries in a compact experimental setup. These structures can be used to study quantum spin physics in a wide range of energies and length scales. By introducing defects into a triangular lattice, kagome and hexagonal lattice structures can be created. Rectangular lattices and (quasi-)one-dimensional structures such as ladders and diamond chain trapping potentials have also been created. Quantum spin models can be studied in all these geometries with Rydberg atoms, which allow for controlled interactions over several micrometers. We also present some nonperiodic geometries where the length scales of the traps are varied over a wide range. These tapered structures offer another way to transport large numbers of atoms adiabatically into subwavelength traps and back.

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Controlling stray electric fields on an atom chip for experiments on Rydberg atoms

Cited by 9 publications

References 33 publications

From coherent collective excitation to Rydberg blockade on an atom chip

From coherent collective excitation to Rydberg blockade on an atom chip

Reducing Rydberg polarizability by microwave dressing

Designs of magnetic atom-trap lattices for quantum simulation experiments

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