Bose-Einstein condensation (BEC) has been observed in a dilute gas of sodium atoms. A Bose-Einstein condensate consists of a macroscopic population of the ground state of the system, and is a coherent state of matter. In an ideal gas, this phase transition is purely quantum-statistical. The study of BEC in weakly interacting systems which can be controlled and observed with precision holds the promise of revealing new macroscopic quantum phenomena that can be understood from first principles.

Bose-Einstein condensation in a gas of sodium atoms

日本物理学会誌及びJournal of the Physical Society of Japanの月刊について

Advances in physics

Journal of Scientific Instruments Editor: Dr H R Lang Vol 28 and Supplement No 1, 1951 Pp xvi + 388 + iii + 80 (London: Institute of Physics, 1951) Bound, £3 12s; unbound, £3

/pdf/a-review-of-scientific-instruments-50cfd4j98s.pdf

A Review of Scientific Instruments

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This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for ⋯ Read more13-11-2021 � The European Physical Journal B Statistical and Nonlinear Physics First-passage time and change of entropy. V. V. Ryazanov. Eur. Phys. J. B, 94 12 (2021) 242. Published online: 11 December 2021. DOI: 10.1140/epjb/s10051 12th International Conference on Atomic and Molecular Data and Their Applications 25-29 September 2022 12-08-2021 � Subjects: Atomic Physics (physics.atom-ph); Chemical Physics (physics.chem-ph); Quantum Physics (quant-ph) [8] arXiv:2108.05996 [ pdf , other ] Title: Ultracold $^{88}\rm{Sr}_2$ molecules in the absolute ground state Copyright code : f0a76c2d68cb7e7cb469c606fb9f8c72

Journal of Physics B: atomic, molecular and optical physics

We present a simple technique for stabilization of a laser frequency off resonance using the Faraday effect in a heated vapor cell with an applied magnetic field. In particular, we demonstrate stabilization of a 780nm laser detuned up to 14GHz from the Rb85D252S1/2F=2 to 52P3/2F′=3 transition. Control of the temperature of the vapor cell and the magnitude of the applied magnetic field allows locking ∼6–14GHz red and blue detuned from the atomic line. We obtain an rms fluctuation of 7MHz over 1h without stabilization of the cell temperature or magnetic field.

/pdf/off-resonance-laser-frequency-stabilization-using-the-42lmrmltax.pdf

Off-resonance laser frequency stabilization using the Faraday effect.

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 1S0 to 1P1 transition at 399 nm for the slower and the narrow 1S0 to 3P1 intercombination line at 556 nm for the MOT. The Cs MOT and slower both use the D2 line (62S1/2 to 62P3/2) at 852 nm. The slower can be switched between loading Yb or Cs in under 0.1 s. We demonstrate that within a few seconds the Zeeman slower loads more than 109 Yb atoms and 108 Cs atoms into their respective MOTs. These are ideal starting numbers for further experiments on ultracold mixtures and molecules.

/pdf/a-versatile-dual-species-zeeman-slower-for-caesium-and-57jl57xyzf.pdf

A versatile dual-species Zeeman slower for caesium and ytterbium

We report the production of ultracold heteronuclear ${\mathrm{Cs}}^{*}\mathrm{Yb}$ molecules through one-photon photoassociation applied to an ultracold atomic mixture of Cs and Yb confined in an optical dipole trap. We use trap-loss spectroscopy to detect molecular states below the $\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}(^{2}P_{1/2})+\mathrm{Yb}(^{1}S_{0})$ asymptote. For $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{174}\mathrm{Yb}$, we observe 13 rovibrational states with binding energies up to $\ensuremath{\sim}500\phantom{\rule{0.28em}{0ex}}\mathrm{GHz}$. For each rovibrational state we observe two resonances associated with the Cs hyperfine structure and show that the hyperfine splitting in the diatomic molecule decreases for more deeply bound states. In addition, we produce ultracold fermionic $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{173}\mathrm{Yb}$ and bosonic $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{172}\mathrm{Yb}$ and $^{133}\mathrm{Cs}\phantom{\rule{0.16em}{0ex}}^{170}\mathrm{Yb}$ molecules. From mass scaling, we determine the number of vibrational levels supported by the 2(1/2) excited-state potential to be 154 or 155.

/pdf/production-of-ultracold-cs-yb-molecules-by-photoassociation-3bbax9wr1j.pdf

Production of ultracold Cs∗Yb molecules by photoassociation

We present a simple technique for stabilization of a laser frequency off resonance using the Faraday effect in a heated vapor cell with an applied magnetic field. In particular we demonstrate stabilization of a 780 nm laser detuned up to 14 GHz from the 85Rb D2 5 2S_1/2 F = 2 to 5 2P_3/2 F' = 3 transition. Control of the temperature of the vapor cell and the magnitude of the applied magnetic field allows locking ~6-14 GHz red and blue detuned from the atomic line. We obtain an rms fluctuation of 16(1) MHz over one hour without stabilization of the cell temperature or magnetic field.

/pdf/off-resonance-laser-frequency-stabilization-using-the-2uwz3ehwnx.pdf

Off resonance laser frequency stabilization using the Faraday effect

We describe an apparatus designed to trap and cool a Yb and Cs mixture. The apparatus consists of a dual species effusive oven source, dual species Zeeman slower, magneto-optical traps in a single ultra-high vacuum science chamber, and the associated laser systems. The dual species Zeeman slower is used to load sequentially the two species into their respective traps. Its design is flexible and may be adapted for other experiments with different mixtures of atomic species. The apparatus provides excellent optical access and can apply large magnetic bias fields to the trapped atoms. The apparatus regularly produces 108 Cs atoms at 13.3 μK in an optical molasses, and 109174Y b atoms cooled to 22 μK in a narrowband magneto-optical trap.

/pdf/production-and-characterization-of-a-dual-species-magneto-3ajawkm3as.pdf

S. A. Hopkins

Papers

Off-resonance laser frequency stabilization using the Faraday effect.

A versatile dual-species Zeeman slower for caesium and ytterbium

Production of ultracold Cs∗Yb molecules by photoassociation

Off resonance laser frequency stabilization using the Faraday effect

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