Light-assisted collisions in ultracold Tm atoms

Cojocaru, Ivan; Pyatchenkov, Sergey; Snigirev, Stepan; Luchnikov, I. A.; Kalganova, E S; Vishnyakova, G. A.; Kublikova, D. N.; Bushmakin, Vladislav; Davletov, E. T.; Tsyganok, V. V.; Belyaeva, O. V.; Хорошилов, А.; Сорокин, В. Н.; Sukachev, Denis D.; Акимов, А. В.

doi:10.1103/physreva.95.012706

Cited by 16 publications

(14 citation statements)

References 51 publications

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“…Low spin quantum numbers make thulium level structure relatively simple compared to other lanthanides. This structure has convenient nearly-cycling cooling transitions [4,5].Due to its high orbital moment thulium was expected to have many low-field Fano-Feshbach resonances similar to erbium and dysprosium [6][7][8]. However, thulium's smaller orbital momentum (having just one hole in its f -shell) should provide a reduction in the number of resonances compared to erbium and dysprosium and may lead to the absence of a chaotic statistic.…”

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confidence: 99%

Random to Chaotic Statistic Transformation in Low-Field Fano-Feshbach Resonances of Cold Thulium Atoms

et al. 2019

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Here, we report on the observation of a random to chaotic temperature transition in the spacing of Fano-Feshbach resonances in the ultracold polarized gas of thulium atoms. This transition is due to the appearance of so-called d -resonances, which are not accessible at low temperatures, in the spectra at high temperatures, which drastically changes thulium's overall resonance statistic. In addition to this statistical change, it has been observed that s -and d -resonances experience quite different temperature shifts: s -resonances experience almost no shift with the temperature, while d -resonances experience an obvious positive shift. In addition, careful analysis of the broad Fano-Feshbach resonances enabled the determination of the sign of thulium's background scattering length. A rethermalization experiment made it possible to estimate a length value of 144 38 a.u. bg a    . This proves

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confidence: 99%

Random to Chaotic Statistic Transformation in Low-Field Fano-Feshbach Resonances of Cold Thulium Atoms

et al. 2019

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“…Double-species MOTs of Er and Dy have also been achieved using this scheme [175]. It has recently been employed in Tm [176,177]. Typically, MOTs containing several 10 7 to 10 9 atoms with final temperatures of ∼6-13 µK are achieved.…”

Section: Optical Cooling Trapping and Evaporative Cooling Of Open-she...mentioning

confidence: 99%

Dipolar physics: A review of experiments with magnetic quantum gases

Chomaz¹,

Ferrier-Barbut²,

Ferlaino³

et al. 2022

Preprint

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“…Thulium atoms were first precooled in a magneto-optical trap operating at 530.7 nm transition in thulium atom (see Figure 1 A, B). Atoms were evaporated in an effusion cell, then slowed down with a Zeeman slower and additionally slowed down with molasses operating at a wavelength of 410.6 nm, and finally captured in a magneto-optical trap operating at 530.7 nm (see previous work [18] for more details). In our trap design, we were able to capture up to 7 3 10  atoms at a temperature of 13 µK.…”

Section: Polarization Of the Atomic Cloudmentioning

confidence: 99%

Polarized cold cloud of thulium atom

Tsyganok

Khlebnikov

Kalganova

et al. 2018

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

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Minimization of internal degrees of freedom is an important step in the cooling of atomic species to degeneracy temperature. Here, we report on the loading of 5 6 10  thulium atoms optically polarized at maximum possible magnetic quantum number 4 F m  state into dipole trap operating at 532 nm. The purity of polarizations of the atoms was experimentally verified using a Stern-Gerlach-type experiment. Experimental measured polarization of the state is 3.91 0.26 F m    . II. INTRODUCTIONCold atoms with temperatures equal or close to the temperature of degenerate gas [1] have attracted a lot of attention in recent years due to their potential in various applications ranging from frequency standards and metrology [2,3] to quantum simulation of electro-magnetic properties of solid state materials [4][5][6], turbulence [7] or even the formation of stars [8].Lanthanides have a special place in the field of quantum simulations due to their unique properties, such as large orbital momentum [9,10] and large magnetic momentum in the ground state [11,12]. Large orbital momentum in the ground state leads to easily tunable interactions between cold atoms via lowfield Feshbach resonances [13], while large magnetic momentum leads to relatively strong dipole-dipole interactions [10]. In particular, the thulium atom has an orbital angular momentum of 3 and magnetic moment of 4 Bohr magnetons in the ground state. In addition, it has a relatively simple level structure, thus combining the strength of more developed Er and Dy [9,14] with the advantage of a clearer system.Cooling of the thulium atom to the Bose-Einstein condensation (BEC) has not been achieved yet.Traditionally, the last step in cooling to BEC temperatures is done via evaporative cooling, either in a magnetic or in an optical dipole trap (ODT). In the case of the thulium atom, inelastic collisions in a magnetic trap were measured and found to be quite substantial [15]; therefore, we selected the optical

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Light-assisted collisions in ultracold Tm atoms

Cited by 16 publications

References 51 publications

Random to Chaotic Statistic Transformation in Low-Field Fano-Feshbach Resonances of Cold Thulium Atoms

Random to Chaotic Statistic Transformation in Low-Field Fano-Feshbach Resonances of Cold Thulium Atoms

Dipolar physics: A review of experiments with magnetic quantum gases

Polarized cold cloud of thulium atom

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