Half-minute-scale atomic coherence and high relative stability in a tweezer clock

Young, Aaron W.; Eckner, William J.; Milner, William R.; Kedar, Dhruv; Norcia, Matthew A.; Oelker, E.; Schine, Nathan; Ye, Jun; Kaufman, Adam M.

doi:10.1038/s41586-020-3009-y

Cited by 163 publications

(141 citation statements)

References 60 publications

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“…We find a loading time of 40(10) ms, where the precision is limited by the temporal resolution of our measurement device, and measure a peak value of 10 atoms in the MOT. Even though the atoms number achieved in this sequence is small as compared to conventional setups 16 , it is likely to be sufficient for applications in optical tweezers such as quantum computing involving Rydberg atoms 37 , 38 and clocks 39 .…”

Section: Resultsmentioning

confidence: 99%

Laser-induced thermal source for cold atoms

Hsu

Larue

Kwong

et al. 2022

Sci Rep

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We demonstrate a simple and compact approach to laser cool and trap atoms based on laser-induced thermal ablation (LITA) of a pure solid granule. A rapid thermalisation of the granule leads to a fast recovery of the ultra-high vacuum condition required for a long trapping lifetime of the cold gas. We give a proof-of-concept of the technique, performing a magneto-optical trap on the 461 nm $$^1S_0\rightarrow \,^1P_1$$ 1 S 0 → 1 P 1 transition of strontium. We get up to 3.5 million of cold strontium-88 atoms with a trapping lifetime of more than 4 s. The lifetime is limited by the pressure of the strontium-free residual background vapour. We also implement an original configuration of permanent magnets to create the quadruple magnetic field of the magneto-optical trap. The LITA technique can be generalized to other atomic elements such as transition metals and lanthanide atoms, and shows a strong potential for applications in quantum technologies ranging from quantum computing to precision measurements such as outdoor inertial sensing.

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Section: Resultsmentioning

confidence: 99%

Laser-induced thermal source for cold atoms

Hsu

Larue

Kwong

et al. 2022

Sci Rep

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“…Ultra-narrow linewidth visible light lasers provide the spectral purity required for precision atomic, molecular and optical (AMO) physics including atomic clocks 1 , 2 , atomic and molecular spectroscopy 3 – 5 , and quantum sensing 1 , 6 , 7 . Historically, it has been necessary to use macroscopic laser systems locked to vapor cells or large optical reference cavities to obtain the low phase noise and high frequency stability needed to address narrow optical clock transitions in atoms 8 , 9 .…”

Section: Introductionmentioning

confidence: 99%

Visible light photonic integrated Brillouin laser

et al. 2021

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Narrow linewidth visible light lasers are critical for atomic, molecular and optical (AMO) physics including atomic clocks, quantum computing, atomic and molecular spectroscopy, and sensing. Stimulated Brillouin scattering (SBS) is a promising approach to realize highly coherent on-chip visible light laser emission. Here we report demonstration of a visible light photonic integrated Brillouin laser, with emission at 674 nm, a 14.7 mW optical threshold, corresponding to a threshold density of 4.92 mW μm−2, and a 269 Hz linewidth. Significant advances in visible light silicon nitride/silica all-waveguide resonators are achieved to overcome barriers to SBS in the visible, including 1 dB/meter waveguide losses, 55.4 million quality factor (Q), and measurement of the 25.110 GHz Stokes frequency shift and 290 MHz gain bandwidth. This advancement in integrated ultra-narrow linewidth visible wavelength SBS lasers opens the door to compact quantum and atomic systems and implementation of increasingly complex AMO based physics and experiments.

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“…Pursuits with dual species, alkaline-earth atoms, and molecules [23][24][25][26][27][28], aim to translate the microscopic control of tweezers to new applications, as well as to harness new internal degrees-offreedom for improved quantum science [18,[29][30][31][32]. In the case of alkaline-earth atoms, marrying tweezer-based control with the long-lived optical transitions characteristic of this atomic group has enabled exploration of tweezer clocks [30,33,34]. The rich internal structure of these atoms also offers new qubit modalities, ranging from Rydberg qubits [18,35], to optical-frequency qubits [19], and to low-energy nuclear qubits [32].…”

Section: Introductionmentioning

confidence: 99%

Ytterbium nuclear-spin qubits in an optical tweezer array

Jenkins,

Lis,

Senoo

et al. 2021

Preprint

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We report on the realization of a fast, scalable, and high-fidelity qubit architecture, based on 171 Yb atoms in an optical tweezer array. We demonstrate several attractive properties of this atom for its use as a building block of a quantum information processing platform. Its nuclear spin of 1/2 serves as a long-lived, coherent, two-level system, while its rich, alkaline-earth-like electronic structure allows for low entropy preparation, fast qubit control, and high fidelity readout. Using narrowline transitions, we present a near-deterministic loading protocol, which allows us to fill a 10×10 tweezer array with 92.73(8)% efficiency and a single tweezer with 96.0(1.4)% efficiency. Employing a robust optical approach, we perform sub-microsecond qubit rotations and characterize their fidelity through randomized benchmarking, yielding 5.2(5)×10 −3 error per Clifford gate. For quantum memory applications, we measure the coherence of our qubits with T * 2 =3.7(4) s and T2=8.1(7) s. Finally, we use 3D Raman sideband cooling to bring the atoms near their motional ground state, which will be central to future implementations of two-qubit gates that benefit from low motional entropy.

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Half-minute-scale atomic coherence and high relative stability in a tweezer clock

Cited by 163 publications

References 60 publications

Laser-induced thermal source for cold atoms

Laser-induced thermal source for cold atoms

Visible light photonic integrated Brillouin laser

Ytterbium nuclear-spin qubits in an optical tweezer array

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