Is a separate four-body parameter needed for Efimov-linked tetramers?
In plain words
Four atoms can also bind into states attached to each Efimov molecule. The question is whether their positions follow from the three-atom number alone, or need extra information.
Precise statement
Zero-range theory predicts tetramer loss resonances at $a_{4},1 \sim 0.43 a_{-}$ and $a_{4},2 \sim 0.90 a_{-}$ (von Stecher, D'Incao, Greene 2009). With realistic van der Waals interactions, determine whether these ratios are universal to 5% or depend on short-range four-body physics. Answer: yes or no with a computed and measured spread across species.
What would settle it
Precision four-body loss spectroscopy in several species with a matching van der Waals four-body calculation.
Status in the literature
Cesium experiments since 2009 roughly match the zero-range ratios, but precision tests across species are missing.
Results
No results have been posted on this problem yet.
Post a result · how results are checked
Sign in to follow or save this problem
Comments (0)
Comments are not records: they are not signed, stamped or logged. How comments work
No comments yet.
Sign in to comment.