PhysRevA.81.013418.pdf (656.92 kB)
Molecular heat pump for rotational states
journal contribution
posted on 2023-06-08, 04:42 authored by C Lazarou, Matthias KellerMatthias Keller, Barry M. GarrawayBarry M. GarrawayIn this work, we investigate the theory for three different unidirectional population-transfer schemes in trapped multilevel systems which can be utilized to cool molecular ions. The approach we use exploits the laser-induced coupling between the internal and motional degrees of freedom so that the internal state of a molecule can be mapped onto the motion of that molecule in an external trapping potential. By sympathetically cooling the translational motion back into its ground state, the mapping process can be employed as part of a cooling scheme for molecular rotational levels. This step is achieved through a common mode involving a laser-cooled atom trapped alongside the molecule. For the coherent mapping, we will focus on adiabatic passage techniques which may be expected to provide robust and efficient population transfers. By applying far-detuned chirped adiabatic rapid passage pulses, we are able to achieve an efficiency of better than 98% for realistic parameters and including spontaneous emission. Even though our main focus is on cooling molecular states, the analysis of the different adiabatic methods has general features which can be applied to atomic systems.
History
Publication status
- Published
File Version
- Published version
Journal
Physical Review AISSN
1050-2947External DOI
Issue
1Volume
81Page range
013418Pages
10.0Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes