Direct laser cooling the NH molecule with the pseudo-closed loop triplet-triplet transition including intervening electronic states

2020 ◽  
pp. 119229
Author(s):  
Niu-Zao Yan ◽  
Chuan-Lu Yang ◽  
Zhao-Peng Sun ◽  
Mei-Shan Wang ◽  
Xiao-Guang Ma
Keyword(s):  
Laser Cooling ◽  
Closed Loop ◽  
Electronic States ◽  
Direct Laser ◽  
Triplet Transition

Direct Laser Cooling Schemes for the Triatomic SOH and SeOH Molecules Based on Ab Initio Electronic Properties

2020 ◽  
Author(s):  
Li Liu ◽  
Chuan-Lu Yang ◽  
Zhaopeng Sun ◽  
Meishan Wang ◽  
Xiano-Guang Ma
Keyword(s):  
Optical Properties ◽  
Ab Initio ◽  
Electronic Properties ◽  
Laser Cooling ◽  
Promising Method ◽  
Optical Scheme ◽  
Electronic And Optical Properties ◽  
Cold Molecules ◽  
Direct Laser

The direct laser cooling is a very promising method to obtain cold molecules for various applications. However, a molecule with satisfactory electronic and optical properties for the optical scheme is...

scholarly journals Direct laser cooling of a symmetric top molecule

Science ◽  
2020 ◽  
Vol 369 (6509) ◽  
pp. 1366-1369 ◽  
Author(s):  
Debayan Mitra ◽  
Nathaniel B. Vilas ◽  
Christian Hallas ◽  
Loïc Anderegg ◽  
Benjamin L. Augenbraun ◽  
...  
Keyword(s):  
Small Molecules ◽  
Laser Cooling ◽  
Particle Physics ◽  
Complex Structure ◽  
Optical Tweezer ◽  
Polyatomic Molecules ◽  
Chiral Molecules ◽  
Direct Laser ◽  
Spin Isomers ◽  
Quantum Science

Ultracold polyatomic molecules have potentially wide-ranging applications in quantum simulation and computation, particle physics, and quantum chemistry. For atoms and small molecules, direct laser cooling has proven to be a powerful tool for quantum science in the ultracold regime. However, the feasibility of laser-cooling larger, nonlinear polyatomic molecules has remained unknown because of their complex structure. We laser-cooled the symmetric top molecule calcium monomethoxide (CaOCH3), reducing the temperature of ~104 molecules from 22 ± 1 millikelvin to 1.8 ± 0.7 millikelvin in one dimension and state-selectively cooling two nuclear spin isomers. These results demonstrate that the use of proper ro-vibronic transitions enables laser cooling of nonlinear molecules, thereby opening a path to efficient cooling of chiral molecules and, eventually, optical tweezer arrays of complex polyatomic species.

scholarly journals Determination of CaOH and CaOCH3 vibrational branching ratios for direct laser cooling and trapping

2019 ◽  
Vol 21 (5) ◽  
pp. 052002 ◽  
Author(s):  
Ivan Kozyryev ◽  
Timothy C Steimle ◽  
Phelan Yu ◽  
Duc-Trung Nguyen ◽  
John M Doyle
Keyword(s):  
Laser Cooling ◽  
Branching Ratios ◽  
Laser Cooling And Trapping ◽  
Direct Laser

Direct laser cooling of molecules

2018 ◽  
Vol 190 (03) ◽  
pp. 313-328 ◽  
Author(s):  
Timur A. Isaev
Keyword(s):  
Laser Cooling ◽  
Direct Laser

Ab initio calculations of the XI molecules (X = Li, Na, K, Rb) with the ionicity and laser cooling analysis

2020 ◽  
Vol 98 (1) ◽  
pp. 45-56 ◽  
Author(s):  
Israa Zeid ◽  
Rania Al Abdallah ◽  
Nayla El-Kork ◽  
Mahmoud Korek
Keyword(s):  
Dipole Moment ◽  
Ab Initio ◽  
Laser Cooling ◽  
Ground State ◽  
Bound States ◽  
Electronic States ◽  
Spectroscopic Constants ◽  
Ionic Character ◽  
Canonical Function ◽  
Dissociation Energies

For the alkali iodide molecules LiI, NaI, KI, and RbI, ab initio CASSCF/(MRCI+Q) calculations have been employed to investigate the adiabatic potential energy curves and the static dipole moment curves of the low-lying singlet and triplet electronic states in the representation 2S+1Λ(+/−). The spectroscopic constants Te, Re, ωe, Be, αe, the dipole moment μe, and the dissociation energies De have been computed for the bound states. Additionally, the percentage ionic character fionic around the equilibrium position of the ground state and the (2)1Σ+ state has been estimated. Using the canonical function approach, these calculations have been followed by a rovibrational calculation from which the rovibrational constants Ev, Bv, Dv, and the abscissas of the turning points Rmin and Rmax for the investigated bound states are calculated.

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

2019 ◽  
Vol 122 (20) ◽  
Author(s):  
Alban Urvoy ◽  
Zachary Vendeiro ◽  
Joshua Ramette ◽  
Albert Adiyatullin ◽  
Vladan Vuletić
Keyword(s):  
Laser Cooling ◽  
Einstein Condensation ◽  
Dipole Trap ◽  
Bose Einstein Condensation ◽  
Direct Laser ◽  
Bose Einstein

scholarly journals Direct Laser Cooling Al${}^{+}$ Ion Optical Clocks

2017 ◽  
Vol 34 (5) ◽  
pp. 050601 ◽  
Author(s):  
Jie Zhang ◽  
Ke Deng ◽  
Jun Luo ◽  
Ze-Huang Lu
Keyword(s):  
Laser Cooling ◽  
Direct Laser
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