Results 71 to 80 of about 113,215 (162)

Radiative neutron capture: Hauser Feshbach vs. statistical resonances

Physics Letters B, 2017
The radiative neutron capture rates for isotopes of astrophysical interest are commonly calculated on the basis of the statistical Hauser Feshbach (HF) reaction model, leading to smooth and monotonically varying temperature-dependent Maxwellian-averaged ...
D. Rochman, S. Goriely, A.J. Koning, H. Ferroukhi   +3 more
doaj   +1 more source

Feshbach engine in the Thomas-Fermi regime

Physical Review Research, 2020
Bose-Einstein condensates can be used to produce work by tuning the strength of the interparticle interactions with the help of Feshbach resonances. In inhomogeneous potentials, these interaction ramps change the volume of the trapped gas, allowing one ...
Tim Keller, Thomás Fogarty, Jing Li, Thomas Busch   +3 more
doaj   +1 more source

Experimental observation of the avoided crossing of two S-matrix resonance poles in an ultracold atom collider

Physical Review Research, 2021
In quantum mechanics, collisions between two particles are captured by a scattering matrix which describes the transfer from an initial entrance state to an outgoing final state.
Matthew Chilcott, Ryan Thomas, Niels Kjærgaard   +2 more
doaj   +1 more source

Anisotropy induced Feshbach resonances in mixture of

New Journal of Physics, 2015
We theoretically explore the scattering properties in collisions between ${}^{6}{\rm{Li}}$ in the ground state and fermionic ${}^{171}{\rm{Yb}}$ in the metastable ${}^{3}{{\rm{P}}}_{2}$ state.
Tao Chen, Cui Zhang, Xiaolin Li, Jun Qian, Yuzhu Wang   +4 more
doaj   +1 more source

Exploring Atom-Ion Feshbach Resonances below the s-Wave Limit

Physical Review X
Hybrid systems of single, trapped ions embedded in quantum gases are a promising platform for quantum simulations and the study of long-range interactions in the ultracold regime.
Fabian Thielemann, Joachim Siemund, Daniel von Schoenfeld, Wei Wu, Pascal Weckesser, Krzysztof Jachymski, Thomas Walker, Tobias Schaetz   +7 more
doaj   +1 more source

Resonance phenomena in vortex-antivortex collisions

Physics Letters B
In this work, we provide a full map of scattering scenarios between a Nielsen-Olesen vortex and antivortex. Importantly, in the deep type II regime, such a collision reveals a chaotic pattern in the final state formation with bounce windows immersed into
M. Bachmaier, A. Wereszczynski
doaj   +1 more source

Exotic hadrons as Feshbach resonances

, 2014
Since ten years ago a host of exotic resonances have challenged the usual quarkonium picture. A number of ideas have been put forward to explain these new states, but a comprehensive framework is still missing.
PILLONI, ALESSANDRO
core   +1 more source

Feshbach resonances in Cesium at Ultra-low Static Magnetic Fields [PDF]

, 2012
5 pages, 4 figures, 1 tableInternational audienceWe have observed Feshbach resonances for 133Cs atoms in two different hyperfine states at ultra-low static magnetic fields by using an atomic fountain clock. The extreme sensitivity of our setup allows for
Bize, S, Marion, H., Clairon, A, Marion, H, Shlyapnikov, G.V., Kokkelmans, SJJMF Servaas, Papoular, David, Papoular, D.J., Kokkelmans, S.J.J.M.F.; id_orcid, Bize, S., Clairon, A., Papoular, DJ, Shlyapnikov, GV, Kokkelmans, S. J., Shlyapnikov, G. V., Kokkelmans, S.J.J.M.F.   +15 more
core   +3 more sources

Magnetically Tunable Feshbach Resonances in Ultracold Li-Yb Mixtures [PDF]

, 2012
We investigate the possibility of forming Li+Yb ultracold molecules by magnetoassociation in mixtures of ultracold atoms. We find that magnetically tunable Feshbach resonances exist, but are extremely narrow for even-mass ytterbium isotopes, which all ...
Brue, Daniel A., Hutson, Jeremy M.
core   +1 more source

Time delays in ultracold atomic and molecular collisions

Physical Review Research, 2019
We study the behavior of the Eisenbud-Wigner collisional time delay around Feshbach resonances in cold and ultracold atomic and molecular collisions. We carry out coupled-channel scattering calculations on ultracold Rb and Cs collisions.
Matthew D. Frye, Jeremy M. Hutson
doaj   +1 more source