Multichannel quantum defect theory for cold molecular collisions

Croft, James F. E.; Wallis, Alisdair O. G.; Hutson, Jeremy M.; Julienne, Paul S.

Abstract

Multichannel quantum defect theory (MQDT) is shown to be capable of producing quantitatively accurate results for low-energy atom-molecule scattering calculations. With a suitable choice of reference potential and short-range matching distance, it is possible to define a matrix that encapsulates the short-range collision dynamics and is only weakly dependent on energy and magnetic field. Once this has been produced, calculations at additional energies and fields can be performed at a computational cost that is proportional to the number of channels N and not to N3. MQDT thus provides a promising method for carrying out low-energy molecular scattering calculations on systems where full exploration of the energy dependence and the field dependence is currently impractical.

Citation

Croft, J. F. E., Wallis, A. O. G., Hutson, J. M., & Julienne, P. S. (2011). Multichannel quantum defect theory for cold molecular collisions. Physical Review A, 84(4), Article 042703. https://doi.org/10.1103/physreva.84.042703

• Journal Article Type: Article
• Publication Date: Jan 1, 2011
• Deposit Date: Jun 19, 2013
• Publicly Available Date: Jun 27, 2013
• Journal: Physical Review A - Atomic, Molecular, and Optical Physics
• Print ISSN: 1050-2947
• Electronic ISSN: 1094-1622
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 84
• Issue: 4
• Article Number: 042703
• DOI: https://doi.org/10.1103/physreva.84.042703
• Public URL: https://durham-repository.worktribe.com/output/1481662