Production and characterization of a dual species magneto-optical trap of cesium and ytterbium

Kemp, S. L.; Butler, K.; Freytag, R.; Hopkins, S. A.; Hinds, E. A.; Tarbutt, M. R.; Cornish, Simon L.

doi:10.1063/1.4941719

Cited by 34 publications

(31 citation statements)

References 68 publications

(104 reference statements)

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“…An advantage of the zero-crossing profile is that lower currents can be used to generate the total span (B L ) of 475 G. Further details of the coil fabrication can be found in Ref. 66.…”

Section: Oven Coils and Laser Systemsmentioning

confidence: 99%

A versatile dual-species Zeeman slower for caesium and ytterbium

Hopkins

Butler

Guttridge

et al. 2016

Review of Scientific Instruments

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We describe the design, construction and operation of a versatile dual-species Zeeman slower for both Cs and Yb, which is easily adaptable for use with other alkali metals and alkaline earths. With the aid of analytic models and numerical simulation of decelerator action, we highlight several real-world problems affecting the performance of a slower and discuss effective solutions. To capture Yb into a magneto-optical trap (MOT), we use the broad $^1S_0$ to $^1P_1$ transition at 399 nm for the slower and the narrow $^1S_0$ to $^3P_1$ intercombination line at 556 nm for the MOT. The Cs MOT and slower both use the D2 line ($6^2S_{1/2}$ to $6^2P_{3/2}$) at 852 nm. We demonstrate that within a few seconds the Zeeman slower loads more than $10^9$ Yb atoms and $10^8$ Cs atoms into their respective MOTs. These are ideal starting numbers for further experiments on ultracold mixtures and molecules.Comment: 15 pages, 15 figures, 4 tables, revtex4-

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“…An advantage of the zero-crossing profile is that lower currents can be used to generate the total span (B L ) of 475 G. Further details of the coil fabrication can be found in Ref. 66.…”

Section: Oven Coils and Laser Systemsmentioning

confidence: 99%

A versatile dual-species Zeeman slower for caesium and ytterbium

Hopkins

Butler

Guttridge

et al. 2016

Review of Scientific Instruments

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“…A detailed description of our experimental apparatus can be found in [51], but we will summarize the main components here. Cs and Yb magneto-optical traps (MOTs) are sequentially loaded from an atomic beam that effuses from a dual-species oven and is slowed by a dual-species Zeeman slower [52].…”

Section: Methodsmentioning

confidence: 99%

Interspecies thermalization in an ultracold mixture of Cs and Yb in an optical trap

et al. 2017

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We present measurements of interspecies thermalization between ultracold samples of 133 Cs and either 174 Yb or 170 Yb. The two species are trapped in a far-off-resonance optical dipole trap and 133 Cs is sympathetically cooled by Yb. We extract effective interspecies thermalization cross sections by fitting the thermalization measurements to a kinetic model, giving σ Cs 174 Yb = (5 ± 2) × 10 −13 cm 2 and σ Cs 170 Yb = (18 ± 8) × 10 −13 cm 2 . We perform quantum scattering calculations of the thermalization cross sections and optimize the CsYb interaction potential to reproduce the measurements. We predict scattering lengths for all isotopic combinations of Cs and Yb. We also demonstrate the independent production of 174 Yb and 133 Cs Bose-Einstein condensates using the same optical dipole trap, an important step towards the realization of a quantum-degenerate mixture of the two species.The realization of ultracold atomic mixtures [1][2][3][4][5][6][7][8][9][10][11][12] has opened up the possibility of exploring new regimes of few-and many-body physics. Such mixtures have been used to study Efimov physics [13][14][15], probe impurities in Bose gases [16], and entropically cool gases confined in an optical lattice [17]. Pairs of atoms in the mixtures can be combined using magnetically or optically tunable Feshbach resonances to create ultracold molecules [18][19][20][21][22][23][24][25][26]. These ultracold molecules have a wealth of applications, such as tests of fundamental physics [27][28][29], realization of novel phase transitions [30][31][32], and the study of ultracold chemistry [33,34]. In addition, the long-range dipole-dipole interactions present between pairs of polar molecules make them useful in the study of dipolar quantum matter [35,36] and ultracold molecules confined in an optical lattice can simulate a variety of condensedmatter systems [37][38][39].Although the large majority of work on ultracold molecules has focused on bi-alkali systems, there is burgeoning interest in pairing alkali-metal atoms with divalent atoms such as Yb [40][41][42][43][44][45] or Sr [46]. The heteronuclear 2 Σ molecules formed in these systems have both an electric and a magnetic dipole moment in the ground electronic state. The extra magnetic degree of freedom opens up new possibilities for simulating a range of Hamiltonians for spins interacting on a lattice and for topologically protected quantum information processing [47].One of the challenging aspects of creating molecules in these systems is that the Feshbach resonances tend to be narrow and sparse. They are narrow because the main coupling responsible for them is the weak distance dependence of the alkali-metal hyperfine coupling, caused by the spin-singlet atom at short range [48] [48,49], and for some systems may be at impractically high magnetic fields. Amongst the various alkali-Yb combinations, CsYb has been proposed as the most favorable candidate because the high mass of Cs facilitates a higher density of bound states near threshold and its large hyperfi...

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“…The magnetic field dependence of ϕ D is given in Figure 9, showing the case of 87 Rb and 41 K. The transition from a constant ϕ D = 1/6 to a decreasing ϕ D ∼ B −2 occurs at a magnetic field that scales with the hyperfine splitting. Thus, while this effect occurs for 87 Rb at rather high magnetic fields, for 41 K, which has the lowest hyperfine splitting of 254 MHz, this effect can be observed at experimentally feasible magnetic fields.…”

Section: Lifetimes In Optical Dipole Trapmentioning

confidence: 96%

“…Recently also mixtures of alkali-metal and Yb or Sr atoms have become available: Rb+Yb [36,37], Li+Yb [11,38,39], Rb+Sr [40], and efforts towards Cs+Yb [41]. Here the main interest comes from the doublet 2 Σ + molecular ground state potential that gives rise to both electric and magnetic tunability of the associated a e-mail: a.s.flores@vu.nl b Present address: Royal Netherlands Meteorological Institute (KNMI), De Bilt, The Netherlands molecules, in contrast to the singlet 1 Σ + ground state potential of bialkali-metal molecules.…”

Section: Introductionmentioning

confidence: 99%

An ultracold, optically trapped mixture of 87Rb and metastable 4He atoms

et al. 2017

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Abstract. We report on the realization of an ultracold (<25 μK) mixture of rubidium ( 87 Rb) and metastable triplet helium ( 4 He) in an optical dipole trap. Our scheme involves laser cooling in a dual-species magneto-optical trap, simultaneous MW-and RF-induced forced evaporative cooling in a quadrupole magnetic trap, and transfer to a single-beam optical dipole trap. We observe long trapping lifetimes for the doubly spin-stretched spin-state mixture and measure much shorter lifetimes for other spin-state combinations. We discuss prospects for realizing quantum degenerate mixtures of alkali-metal and metastable helium atoms.

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Production and characterization of a dual species magneto-optical trap of cesium and ytterbium

Cited by 34 publications

References 68 publications

A versatile dual-species Zeeman slower for caesium and ytterbium

A versatile dual-species Zeeman slower for caesium and ytterbium

Interspecies thermalization in an ultracold mixture of Cs and Yb in an optical trap

An ultracold, optically trapped mixture of 87Rb and metastable 4He atoms

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