According to their threshold behavior, we find Feshbach resonances can be classified into two types.doi:10.48550/arXiv.cond-mat/0506313Cheng ChinPhysicsC. Chin, A simple model of Feshbach molecules, cond-mat/0506313 (2005).Cheng Chin. A simple model of Feshbach molecules. http://arxiv.org...
Here we report a very pronounced and narrow (25 mG) Feshbach resonance in collisions between two triplet ground-state NaLi molecules. This molecular Feshbach resonance has two special characteristics. First, the collisional loss rate is enhanced by more than two orders of magnitude above the ...
Key collision integrals emerge that govern the relaxation of the atom–molecule mixture to chemical and thermal equilibrium. Our focus is on the pseudogap regime where molecules form above the superfluid transition temperature. In this regime, we formulate a simple model for the atom–molecule ...
Varying the temperature can hence provide some insight into to the energy dependence of the resonance18,19,20, but by its nature this method is associated with thermal broadening. Measurements in the energy domain have also been achieved by dissociating Feshbach molecules through a fast and non-...
For example, Surko and coworkers have measured positron binding energies (or positron affinities) for a number of molecules, including organic polyatomic compounds, through vibrational Feshbach resonances using well-controlled positron beams [6], [7], [8], [9]. In addition to this experimental ...
(1–100 keV) relevant to astrophysical processes that creates the heaviest elements, neutron capture can be described by Hauser-Feshbach theory [134,135,136]. This statistical approach is based on the formation of a compound nucleus and is valid for nuclei that have sufficiently high level ...
The (single-channel) model Hamiltonian shown above provide the simplest description of ultracold 6Li and 40K atoms near broad Feshbach resonances [6], [7], [8]. In the case of narrow Feshbach resonances, it is necessary to use a two-channel model and to include molecules in the closed ...
Even though they are charged and have a short (479 ± 3) ps mean lifetime [62], one could use the Doppler shift of the Ps+ Feshbach resonance to measure their emission energy spectra [76,77]. The emission of Ps+ and Ps2 by these means will occur at high positron densities with or...
This can be used for detecting Feshbach resonances of ultracold molecules by measuring the microwave field absorption and for tuning the elastic scattering cross sections of ultracold molecules by varying the frequency and intensity of the microwave field in a wide range of the field parameters....
We model combined photoassociation and Feshbach resonances in a Bose-Einstein condensate, where the shared dissociation continuum allows for quantum interference in losses from the condensate, as well as a dispersive-like shift of resonance. A simple analytical model, based on the limit of weakly ...