All-optical production and transport of a large<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Li</mml:mi><mml:mprescripts /><mml:none /><mml:mn>6</mml:mn></mml:mmultiscripts></mml:math>quantum gas in a crossed optical dipole trap

Gross, Ch.; Gan, Jaren; Dieckmann, Kai

doi:10.1103/physreva.93.053424

Cited by 21 publications

(10 citation statements)

References 34 publications

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“…Unless noted otherwise, r 0 = 0.6 µm is used in all further simulations as a trade-off between simulation time and realistic atomic densities (see e.g. [60]). Demanding only one atom at a time inside the sphere around one of the ions results in a density of ρ a = 1 4/3πr 3 0 N ions < 1.1 • 10 18 m −3 .…”

Section: Figure A2mentioning

confidence: 99%

Prospects of reaching the quantum regime in Li–Yb⁺ mixtures

Fürst¹,

Ewald²,

Secker³

et al. 2018

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

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We perform numerical simulations of trapped 171 Yb + ions that are buffer gas cooled by a cold cloud of 6 Li atoms. This species combination has been suggested to be the most promising for reaching the quantum regime of interacting atoms and ions in a Paul trap. Treating the atoms and ions classically, we compute that the collision energy indeed reaches below the quantum limit for a perfect linear Paul trap. We analyze the effect of imperfections in the ion trap that cause excess micromotion. We find that the suppression of excess micromotion required to reach the quantum limit should be within experimental reach. Indeed, although the requirements are strong, they are not excessive and lie within reported values in the literature. We analyze the detection and suppression of excess micromotion in our experimental setup. Using the obtained experimental parameters in our simulation, we calculate collision energies that are a factor 2-11 larger than the quantum limit, indicating that improvements in micromotion detection and compensation are needed there. We also analyze the buffergas cooling of linear and two-dimensional ion crystals. We find that the energy stored in the eigenmodes of ion motion may reach 10-100 µK after buffer-gas cooling under realistic experimental circumstances. Interestingly, not all eigenmodes are buffer-gas cooled to the same energy. Our results show that with modest improvements of our experiment, studying atom-ion mixtures in the quantum regime is in reach, allowing for buffer-gas cooling of the trapped ion quantum platform and to study the occurrence of atom-ion Feshbach resonances.

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Section: Figure A2mentioning

confidence: 99%

Prospects of reaching the quantum regime in Li–Yb⁺ mixtures

Fürst¹,

Ewald²,

Secker³

et al. 2018

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

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“…Iodine absorption lines at 647 nm are very close to doubled wavelength (2×323 nm) of the 2S → 3P transition of atomic lithium (Li). Therefore, these iodine lines can be frequency references for Li atom research, e.g., the development of laser cooling [15,16] and the measurement of hyperfine intervals [17]. The frequency references at 647 nm using a simple iodine cell are particularly helpful in regards to studying lithium spectroscopy, especially for atomic physics laboratories where no optical frequency combs are available.…”

Section: Introductionmentioning

confidence: 99%

Absolute frequency measurement of molecular iodine hyperfine transitions at 647 nm

Huang¹,

Guan²,

Suen³

et al. 2018

Appl. Opt.

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We report absolute frequency measurements of molecular iodine P(46) 5-4 a, a, and a hyperfine transitions at 647 nm with a fiber-based frequency comb. The light source is based on a Littrow-type external-cavity diode laser. A frequency stability of 5×10 at a 200 s integration time is achieved when the light source is stabilized to the P(46) 5-4 a line. The pressure shift is determined to be -8.3(7) kHz/Pa. Our determination of the line centers reached a precision of 21 kHz. The light source can serve as a reference laser for lithium spectroscopy (2S→3P).

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“…The experiment begins by transporting pre-cooled 7 Li gases captured in a vacuum chamber (main chamber) to an adjacent vacuum chamber (science chamber), where a high-resolution imaging system is installed. The central displacement between the two vacuum chambers is 460 mm, and we transport the cold thermal gases in the main chamber to the science chamber by moving the focal position of an optical potential (transport trap) [36,37]. The transport trap is made of a 1,064 nm laser beam and has a pancake-shaped geometry with a vertical (lateral) beam waist of 19(535) µm at the main chamber.…”

Section: A Optical Transportmentioning

confidence: 99%

Site-Resolved Imaging of Bosonic Mott Insulator of $^7$Li atoms

Kwon,

Kim,

Hur

et al. 2021

Preprint

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We demonstrate a single-site and single-atom-resolved fluorescence imaging of a bosonic Mott insulator of 7 Li atoms in an optical lattice. The fluorescence images are obtained by implementing Raman sideband cooling on a deep two-dimensional square lattice, where we collect scattered photons with a high numerical aperture objective lens. The square lattice is created by a folded retro-reflected beam configuration that can reach 2.5 mK lattice depth from a single laser source. The lattice beam is elliptically focused to have a large area with deep potential. On average 4,000 photons are collected per atom during 1 s of the Raman sideband cooling, and the imaging fidelity is over 95% in the central 80×80 lattice sites. As a first step to study correlated quantum phases, we present the site-resolved imaging of a Mott insulator. Tuning the magnetic field near the Feshbach resonance, the scattering length can be increased to 680a B , and we are able to produce a large-sized unity filling Mott insulator with 2,000 atoms at low temperature. Our work provides a stepping stone to further in-depth investigations of intriguing quantum many-body phases in optical lattices.

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All-optical production and transport of a largeLi6quantum gas in a crossed optical dipole trap

Cited by 21 publications

References 34 publications

Prospects of reaching the quantum regime in Li–Yb⁺ mixtures

Prospects of reaching the quantum regime in Li–Yb⁺ mixtures

Absolute frequency measurement of molecular iodine hyperfine transitions at 647 nm

Site-Resolved Imaging of Bosonic Mott Insulator of $^7$Li atoms

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All-optical production and transport of a largeLi6quantum gas in a crossed optical dipole trap

Cited by 21 publications

References 34 publications

Prospects of reaching the quantum regime in Li–Yb+ mixtures

Prospects of reaching the quantum regime in Li–Yb+ mixtures

Absolute frequency measurement of molecular iodine hyperfine transitions at 647 nm

Site-Resolved Imaging of Bosonic Mott Insulator of $^7$Li atoms

Contact Info

Product

Resources

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Prospects of reaching the quantum regime in Li–Yb⁺ mixtures

Prospects of reaching the quantum regime in Li–Yb⁺ mixtures