2012/06/07 by R. Combescot, Combescot, R., X. Leyronas +1 · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Nuclear Theory (nucl-th) #Quantum Gases (cond-mat.quant-gas) #Quantum Physics (quant-ph) #cond-mat.quant-gas #nucl-th #quant-ph
paper · pdf · doi:10.48550/arxiv.1206.1569
5 pages, 6 figures
arxiv created 2012/06/07 · openalex publication_date 2012/06/07 · arxiv updated 2012/06/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show that, near a Feshbach resonance, a strong p-wave resonance is present at low energy in atom-dimer scattering for 6Li-40K fermionic mixtures. This resonance is due to a virtual bound state, in the atom-dimer system, which is present at this low energy. When the mass ratio between the two fermionic elements is increased, this virtual bound state goes to a known real bound state which appears when the mass ratio reaches 8.17. This resonance should affect a number of physical properties. These include the equation of state of unbalanced mixtures at very low temperature but also the equation of state of balanced mixtures at moderate or high temperature. The frequency and the damping of collective modes should also provide a convenient way to evidence this resonance. Finally it should be possible to modify the effective mass of one the fermionic species by making use of an optical lattice. This would allow to study the strong dependence of the resonance as a function of the mass ratio of the two fermionic elements.