Isotope-agnostic motional ground-state cooling of neutral Yb atoms

• URL: http://arxiv.org/abs/2506.09031v2
• Date: Thu, 12 Jun 2025 16:53:06 GMT
• Title: Isotope-agnostic motional ground-state cooling of neutral Yb atoms
• Authors: Ronen M. Kroeze, René A. Villela, Er Zu, Tim O. Höhn, Monika Aidelsburger,
• Abstract summary: We demonstrate direct ground-state cooling of fermionic $171$Yb and bosonic $174$Yb atoms in two- and three-dimensional optical lattices.<n>We develop a chirped sideband cooling scheme, where we sweep the clock-laser frequency to mitigate the effects of spatial trap inhomogeneities.<n>Applying the same scheme in 3D results in $barnsimeq0.15$ limited by layer-to-layer inhomogeneities in the vertical direction.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Efficient high-fidelity ground-state cooling of motional degrees of freedom is crucial for applications in quantum simulation, computing and metrology. Here, we demonstrate direct ground-state cooling of fermionic $^{171}$Yb and bosonic $^{174}$Yb atoms in two- and three-dimensional magic-wavelength optical lattices on the ultranarrow clock transition. Its high spectral resolution offers the potential for reaching extremely low temperatures. To ensure efficient cooling, we develop a chirped sideband cooling scheme, where we sweep the clock-laser frequency to mitigate the effects of spatial trap inhomogeneities. We further generalize the theoretical description of sideband spectra to higher-dimensional lattices for precise thermometry. We achieve 2D ground state fractions of $97\%$ for $^{171}$Yb with an average motional occupation of $\bar{n}\simeq0.015$ and provide a direct comparison with $^{174}$Yb, reaching similar cooling performance. Applying the same scheme in 3D results in $\bar{n}\simeq0.15$ limited by layer-to-layer inhomogeneities in the vertical direction. These results demonstrate efficient motional ground-state cooling in optical lattices, especially for bosonic alkaline-earth(-like) atoms, where other methods are not applicable, opening the door to novel protocols for quantum science applications with neutral atoms.

Related papers

• Single-atom imaging of ${}^{173}$Yb in optical tweezers loaded by a five-beam magneto-optical trap [40.572754656757475]
  We report on the trapping and imaging of individual ytterbium atoms in arrays of optical tweezers.<n>In our five-beam magneto-optical trap, gravity balances the radiation pressure of a single upward-directed beam.<n>We demonstrate the first single-atom-resolved imaging of the fermionic isotope, large-spin $173$Yb.
  arXiv  Detail & Related papers  (2025-05-12T09:14:02Z)
• Homogeneous fermionic Hubbard gases in a flat-top optical lattice [9.357258889345438]
  We develop a hybrid potential that integrates a flat-top optical lattice with an optical box trap.<n>We capture a well-defined energy band occupation that aligns perfectly with the theoretical calculations for a zero-temperature fermionic Hubbard model.<n>We observe a non-monotonic temperature dependence in $D$, revealing the Pomeranchuk effect.
  arXiv  Detail & Related papers  (2025-02-12T04:06:31Z)
• Determining the $^3$P$_0$ excited-state tune-out wavelength of $^{174}$Yb in a triple-magic lattice [0.0]
  tune-out wavelengths for the clock state pair in alkaline-earth(-like) atoms provide maximally state-selective trap conditions.<n>We report on the measurement of a tune-out wavelength for the metastable $3$P$_0$ clock state in $174$Yb at $519.920(9),$THz.
  arXiv  Detail & Related papers  (2024-12-18T18:56:30Z)
• Electromagnetically-Induced-Transparency Cooling of High-Nuclear-Spin Ions [2.6541853091340046]
  EIT cooling of atoms or ions with a complex ground-state structure is challenging due to the lack of an isolated $Lambda$ system. We overcome this issue by leveraging an EIT pumping laser to repopulate the cooling subspace. Our approach can be adapted to atomic species possessing similar level structures.
  arXiv  Detail & Related papers  (2024-08-22T02:31:41Z)
• Optical coherence properties of Kramers' rare-earth ions at the nanoscale for quantum applications [41.30071614056703]
  Rare-earth (RE) ion doped nano-materials are promising candidates for a range of quantum technology applications. Among RE ions, the so-called Kramers' ions possess spin transitions in the GHz range at low magnetic fields. We measure spectroscopic properties that are of relevance to using these materials in quantum technology applications.
  arXiv  Detail & Related papers  (2023-03-03T16:23:29Z)
• Bottom-up approach to room temperature quantum systems [4.730766630161825]
  We have isolated and tracked very slowly moving individual atoms without the aid of laser cooling. Results demonstrate the power and scalability of thermal ensembles for utilization in quantum memories, imaging, and other quantum information applications.
  arXiv  Detail & Related papers  (2022-12-07T22:04:03Z)
• Rapid generation of all-optical $^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance [58.720142291102135]
  We investigate the production of all-optical $39$K Bose-Einstein condensates with different scattering lengths using a Feshbach resonance near $33$ G. We are able to produce fully condensed ensembles with $5.8times104$ atoms within $850$ ms evaporation time at a scattering length of $232. Based on our findings we describe routes towards high-flux sources of ultra-cold potassium for inertial sensing.
  arXiv  Detail & Related papers  (2022-01-12T16:39:32Z)
• High-resolution 'magic'-field spectroscopy on trapped polyatomic molecules [62.997667081978825]
  Rapid progress in cooling and trapping of molecules has enabled first experiments on high resolution spectroscopy of trapped diatomic molecules. Extending this work to polyatomic molecules provides unique opportunities due to more complex geometries and additional internal degrees of freedom.
  arXiv  Detail & Related papers  (2021-10-21T15:46:17Z)
• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic [52.77024349608834]
  We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes. We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies. We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
  arXiv  Detail & Related papers  (2021-02-24T17:46:15Z)
• Quantum anomalous Hall phase in synthetic bilayers via twistless twistronics [58.720142291102135]
  We propose quantum simulators of "twistronic-like" physics based on ultracold atoms and syntheticdimensions. We show that our system exhibits topologicalband structures under appropriate conditions.
  arXiv  Detail & Related papers  (2020-08-06T19:58:05Z)
• Cooling of a Zero-Nuclear-Spin Molecular Ion to a Selected Rotational State [0.0]
  We demonstrate rotational cooling of the silicon monoxide cation via optical pumping by a spectrally filtered broadband laser. Compared with diatomic hydrides, SiO+ is more challenging to cool because of its smaller rotational interval. The absence of hyperfine structure in its dominant isotopologue greatly reduces demands for pure quantum state preparation.
  arXiv  Detail & Related papers  (2020-05-13T21:51:10Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.