Dysprosium magneto-optical traps

Youn, Seo Ho; Lu, Mingwu; Ray, Ushnish; Lev, Benjamin

doi:10.1103/physreva.82.043425

Cited by 83 publications

(85 citation statements)

References 44 publications

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“…Several exotic atoms have been successfully loaded into magneto-optical traps (MOTs [48,95]), including Yb [96,97], Ag [98], Er [99], Dy [100] and Tm [101]. Because these atoms have much higher melting points than alkali atoms, effusive oven sources used to create these atomic beams operated at high temperatures, between 700 and 1500 K. A Zeeman slower is typically needed to decelerate the fast-moving atoms (v ∼ 350 − 580 m s −1 ) for efficiently loading into MOT, which has a typical capture velocity < 60 m s −1 .…”

Section: Direct Loading Of Exotic Atoms Into Magneto-optical Trapsmentioning

confidence: 99%

The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules

2012

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Section: Direct Loading Of Exotic Atoms Into Magneto-optical Trapsmentioning

confidence: 99%

The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules

2012

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“…This opens important opportunities in studying strongly correlated matter when gases of Dy atoms is cooled to ultracold temperatures [13]. Recent progress in Doppler and sub-Doppler cooling is an important step in this direction [13][14][15][16][17]. In addition to narrow-line magneto-optical trapping (MOT) [18], further cooling on narrow optical transitions might be possible using resolved-sideband cooling [19,20].…”

Section: Introductionmentioning

confidence: 99%

Dynamic polarizabilities and magic wavelengths for dysprosium

2011

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We theoretically study dynamic scalar polarizabilities of the ground and select long-lived excited states of dysprosium, a highly magnetic atom recently laser cooled and trapped. We demonstrate that there are a set of magic wavelengths of the unpolarized lattice laser field for each pair of states which includes the ground state and one of these excited states. At these wavelengths, the energy shift due to laser field is the same for both states, which can be useful for resolved sideband cooling on narrow transitions and precision spectroscopy. We present an analytical formula which, near resonances, allows for the determination of approximate values of the magic wavelengths without calculating the dynamic polarizabilities of the excited states.

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“…This collection of lines is reflected in a wide choice of possible schemes for laser cooling experiments. However, all experiments on Zeeman slowing and cooling in a magneto-optical trap (MOT) with magnetic lanthanides so far relied on an approach, essentially based on the strongest cycling transition [9,10,13]. This broad transition typically lies in the blue between 400 and 430 nm and has a linewidth on the order of few tens of MHz.…”

mentioning

confidence: 99%

“…To further decrease the temperature of atoms prior to the dipole trap loading, an additional MOT stage based on an ultra-narrow kHzlinewidth transition was applied in Refs. [11,13], making the whole experimental procedure more involved. Taking advantage of the rich atomic spectrum of lanthanides, we identify a different transition to be the most suitable one for MOT operation towards production of a quantumdegenerate gas.…”

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confidence: 99%

Narrow-line magneto-optical trap for erbium

et al. 2012

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We report on the experimental realization of a robust and efficient magneto-optical trap for erbium atoms, based on a narrow cooling transition at 583 nm. We observe up to N = 2 × 10 8 atoms at a temperature of about T = 15 µK. This simple scheme provides better starting conditions for direct loading of dipole traps as compared to approaches based on the strong cooling transition alone, or on a combination of a strong and a narrow kHz transition. Our results on Er point to a general, simple and efficient approach to laser cool samples of other lanthanide atoms (Ho, Dy, and Tm) for the production of quantum-degenerate samples.PACS numbers: 37.10. De, 37.10.Vz Laser cooling of non-alkali atoms has become a very active and challenging field of research. The great appeal of unconventional atomic systems for experiments on ultracold atomic quantum gases stems from the possibility of engineering complex interactions and of accessing rich atomic energy spectra. Both features are at the foundation of a number of novel fascinating phenomena. For instance the energy spectra of two-valence-electron species, as alkaline earth and alkalineearth-like atoms, feature narrow and ultra-narrow optical transitions, which are key ingredients for ultra-precise atomic clocks [1], efficient quantum computation schemes [2], and novel laser cooling approaches as beautifully demonstrated in experiments with Sr, Yb,.As a next step in complexity, multi-valence-electron atoms with non-S electronic ground state such as lanthanides are currently attracting an increasing experimental and theoretical interest. Among many, one of the special features of lanthanides is the exceptionally large magnetic dipole moment of atoms in the electronic ground state (e. g. 7 µ B for Er and 10 µ B for both Dy and Tb), which provides a unique chance to study strongly dipolar phenomena with atoms. Highly magnetic atoms interact with each other not only via the usual contact interaction but also via an anisotropic and long-range interaction, known as the dipole-dipole interaction [6]. Chromium was the first atomic species used for experiments on atomic dipolar quantum gases [7,8], and the even more magnetic lanthanides are nowadays in the limelight thanks to laser cooling experiments on Er and Tm [9,10] and to the recent realization of quantumdegenerate Dy gases [11,12].Similarly to Yb and the alkaline earth atoms, the atomic energy spectra of magnetic lanthanides include broad, narrow, and ultra-narrow optical transitions. This collection of lines is reflected in a wide choice of possible schemes for laser cooling experiments. However, all experiments on Zeeman slowing and cooling in a magneto-optical trap (MOT) with magnetic lanthanides so far relied on an approach, essentially based on the strongest cycling transition [9,10,13]. This broad transition typically lies in the blue between 400 and 430 nm and has a linewidth on the order of few tens of MHz. As a consequence, the Doppler temperature is close to a mK. Such a high temperature makes direct loading f...

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Dysprosium magneto-optical traps

Cited by 83 publications

References 44 publications

The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules

The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules

Dynamic polarizabilities and magic wavelengths for dysprosium

Narrow-line magneto-optical trap for erbium

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