Multichannel Quantum Defect Theory for cold molecular collisions

Details Multichannel Quantum Defect Theory for cold molecular collisions Multichannel Quantum Defect Theory for cold molecular collisions

2011-05-23

arxiv.org/abs/1105.4483v2

Physics

Atomic Physics

9 pages, 9 figures. Final version, incorporating responses to referees' comments

Scientific paper

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 N^3. MQDT thus provides a promising method for carrying out low-energy molecular scattering calculations on systems where full exploration of the energy- and field-dependence is currently impractical.

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