CoPoMol - Collision of Cold Polar Molecules

• Applicant: Professor Dr. Gerardus Meijer
• Co-Applicants: Professor Dr. Jeremy M. Hutson; Professor Dr. Robert Moszynski; Professor Dr. Michael Tarbutt
• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: from 2007 to 2012
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 44171745

A major objective of the EuroQUAM program is to achieve quantum degeneracy for polar molecules. It is already possible to slow polar molecules almost to rest using inhomogeneous electric fields and trap them at temperatures around 1 milliKelvin. However, quantum degeneracy requires considerably lower temperatures, and to achieve it for decelerated molecules it will be necessary to develop a second-stage cooling mechanism that can reach the sub-microKelvin regime. A very promising approach to this is sympathetic cooling, in which the molecules are cooled by contact with ultracold atoms. This proposal brings together two leading experimental groups (Berlin, London) and three theoretical groups (Durham, Warsaw, Nijmegen) to explore sympathetic cooling and to develop our understanding of atom-molecule and molecule-molecule collisions. The interplay between theory and experiment was pivotal in the creation of atomic quantum gases and will be equally crucial for polar molecules. This proposal is for a closely integrated experimental and theoretical study. We will investigate both the atom-molecule collisions that are crucial for sympathetic cooling and the molecule-molecule collisions that will become important in traps containing cold polar molecules. This will allow us to design the trap geometries needed to achieve sympathetic cooling for polar molecules. It will provide the basis for achieving condensation to form a dipolar quantum gas and pave the the way to the development of controlled ultracold chemistry.

• DFG Programme: Research Grants
• International Connection: Netherlands, Poland, United Kingdom
• Participating Person: Dr. Gerrit Groenenboom