Direct Laser Cooling to Bose-Einstein Condensation in a Dipole Trap

Urvoy, Alban; Vendeiro, Zachary; Ramette, J.; Adiyatullin, Albert F.; Vuletić, Vladan

doi:10.1103/physrevlett.122.203202

Cited by 76 publications

(50 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nowadays, it is routinely used to cool and trap alkali-metal, alkaline-earth, noble-gas, and, most-recently, the heavy magnetic lanthanide atoms [2][3][4][5][6][7][8]. Temperatures well below one millikelvin at number densities between 10 9 and 10 15 atoms per cubic centimeter are reached [9,10]. Select other atomic species in the periodic table, notably chromium [11], have also been laser cooled.…”

Section: Introductionmentioning

confidence: 99%

Prospects for laser cooling of polyatomic molecules with increasing complexity

Kłos

Kotochigova

2020

Phys. Rev. Research

View full text Add to dashboard Cite

Optical cycling transitions and direct laser cooling have recently been demonstrated for a number of alkalineearth dimers and trimer molecules. This is made possible by diagonal Franck-Condon factors between the vibrational modes of the optical transition. Achieving a similar degree of cooling to microkelvin equivalent kinetic energy for larger polyatomic molecules, however, remains challenging. Since polyatomic molecules are characterized by multiple degrees of freedom and have a correspondingly more complex structure, it is far from obvious whether there exist polyatomic molecules that can repeatedly scatter photons. Here, we propose chemical substitution approaches to engineer large polyatomic molecules with optical cycling centers (OCCs) containing alkaline-earth oxide dimers or acetylenic alkaline-earth trimers (i.e., M−C ≡ C) connected to (CH) n chains or fullerenes. To validate the OCC-character of the selected molecules, we performed electronic structure calculations of the equilibrium configuration of both ground and excited potential energy surfaces, evaluated their vibrational and bending modes, and corresponding Franck-Condon factors for all but the most complex molecules. For fullerenes, we have shown that OCCs based on M−C ≡ C can perform better than those based on alkaline-earth oxide dimers. In addition, for heavier polyatomic molecules it might be advantageous to attach two OCCs, thereby potentially doubling the photon scattering rate and thus speeding up cooling rates.

show abstract

Section: Introductionmentioning

confidence: 99%

Prospects for laser cooling of polyatomic molecules with increasing complexity

Kłos

Kotochigova

2020

Phys. Rev. Research

View full text Add to dashboard Cite

show abstract

“…In this configuration the trapping light drives the |ν; 6S 1/2 , F = 3, m F = 3 → |ν − 1; 6S 1/2 , F = 3, m F = 2 Raman transition, with calculated Rabi frequency of 2π×2 kHz. Unlike previous realizations of laser cooling to quantum degeneracy in 87 Rb [11,12], we use light resonant with the |6S 1/2 , F=3 → |6P 3/2 , F'=2 transition to optically pump the atoms from the |3, 2 state back to |3, 3 using spontaneous Raman scattering, removing entropy from the system (see Fig. 1b for the atomic level structure).…”

Section: Methodsmentioning

confidence: 99%

Strongly Correlated Quantum Gas Prepared by Direct Laser Cooling

et al. 2019

Self Cite

View full text Add to dashboard Cite

We create a one-dimensional strongly correlated quantum gas of 133 Cs atoms with attractive interactions by direct laser cooling in 300 ms. After compressing and cooling the optically trapped atoms to the vibrational ground state along two tightly confined directions, the emergence of a non-Gaussian time-of-flight distribution along the third, weakly confined direction reveals that the system enters a quantum degenerate regime. We observe a strong reduction of two-and three-body spatial correlations and infer that the atoms are directly cooled into a highly correlated excited metastable state, known as a super-Tonks-Girardeau gas.

show abstract

“…Raman sideband cooling [67][68][69] might be a better alternative for thermal ensembles even if it is limited to about an order of magnitude larger temperatures than what the BEC ensembles could reach. Other recent techniques avoiding evaporation [70][71][72] might also be promising for a future use in the field.…”

Section: Expansion Rate and Collimationmentioning

confidence: 99%

Inertial sensing with quantum gases: a comparative performance study of condensed versus thermal sources for atom interferometry

et al. 2021

View full text Add to dashboard Cite

Quantum sensors based on light pulse atom interferometers allow for measurements of inertial and electromagnetic forces such as the accurate determination of fundamental constants as the fine structure constant or testing foundational laws of modern physics as the equivalence principle. These schemes unfold their full performance when large interrogation times and/or large momentum transfer can be implemented. In this article, we demonstrate how interferometry can benefit from the use of Bose–Einstein condensed sources when the state of the art is challenged. We contrast systematic and statistical effects induced by Bose–Einstein condensed sources with thermal sources in three exemplary science cases of Earth- and space-based sensors. Graphic abstract

show abstract

Direct Laser Cooling to Bose-Einstein Condensation in a Dipole Trap

Cited by 76 publications

References 41 publications

Prospects for laser cooling of polyatomic molecules with increasing complexity

Prospects for laser cooling of polyatomic molecules with increasing complexity

Strongly Correlated Quantum Gas Prepared by Direct Laser Cooling

Inertial sensing with quantum gases: a comparative performance study of condensed versus thermal sources for atom interferometry

Contact Info

Product

Resources

About