Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

Interferometric measurement of ultracold collision properties using an atom collider

A. C. Wilson, Niels Kjærgaard, Angela S. Mellish

Published Jan 1, 2005• 0 citations
Publisher
DOI
10.1109/iqec.2005.1560873

Related papers

Advanced ultracold sources for atomic physics and atom interferometry

Julien Dugué

•Jan 1, 2009•0 citations

Quantum Scattering in an Optical Collider for Ultracold Atoms

Ryan Thomas, Matthew Chilcott, C. S. Chisholm +4 more

We report on experiments investigating the collisional properties of atoms at ultralow collision energies using an all-optical atom collider. By using a pair of optical tweezers, we can manipulate two ultracold atom clouds and collide them together at energies up to three orders of magnitude larger than their thermal energy. Our experiments measure the scattering of 87 Rb, 40 K, and 40 K- 87 Rb collisions. The versatility of our collider allows us to probe both shape resonances and Feshbach resonances in any partial wave. As examples, we present experiments demonstrating p-wave scattering with indistinguishable fermions, inelastic scattering at non-zero energies near a homonuclear Feshbach resonance, and partial wave interference in heteronuclear collisions.

arXiv:1709.05462•Journal of Physics Conference Series•Nov 1, 2017•7 citations

Collisional properties and many body effects in ultracold systems. Quantum interferometry.

Tomasz Wasak

•Jun 8, 2015•0 citations

Differential scattering measurements from a collider for ultracold atoms

Niels Kjærgaard, Angela S. Mellish, A. C. Wilson

We present a method for measuring differential cross sections from scattering halos produced by cold collisions between ultracold atomic clouds. Our scheme incorporates the dynamics of scattered particles within a harmonic potential that is used as a collider for the clouds. We demonstrate how to transform an experimentally acquired absorption image in order to obtain the angular scattering probability density.

New Journal of Physics•Oct 28, 2004•18 citations

Quantum scattering of distinguishable bosons using an ultracold-atom collider

Angela S. Mellish, Niels Kjærgaard, Paul S. Julienne +1 more

We describe an implementation of a magnetic collider for investigating cold collisions between ultracold atomic clouds in different spin states, and we use this to study scattering involving both even- and odd-order partial waves. Our method relies on the axial asymmetry of a double-well magnetic trap to selectively prepare the spin state in each cloud. We measure the energy dependence of $s$, $p$, and $d$ partial-wave phase shifts in collisions up to $300\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}\mathrm{K}$ between $^{87}\mathrm{Rb}$ atoms in the $5{S}_{1∕2},F=1,{m}_{F}=\ensuremath{-}1$ and $5{S}_{1∕2},F=2,{m}_{F}=1$ states.

arXiv:cond-mat/0610445•Physical Review A•Feb 16, 2007•13 citations

Ultracold Atom Collisions Probed With Ultrashort Laser Pulses

Fredrik K. Fatemi, K. M. Jones, Paul D. Lett

•Jan 1, 2000•0 citations
We report on experiments investigating the collisional properties of atoms at ultralow collision energies using an all-optical atom collider. By using a pair of optical tweezers, we can manipulate two ultracold atom clouds and collide them together at energies up to three orders of magnitude larger than their thermal energy. Our experiments measure the scattering of 87 Rb, 40 K, and 40 K- 87 Rb collisions. The versatility of our collider allows us to probe both shape resonances and Feshbach resonances in any partial wave. As examples, we present experiments demonstrating p-wave scattering with indistinguishable fermions, inelastic scattering at non-zero energies near a homonuclear Feshbach resonance, and partial wave interference in heteronuclear collisions.
We describe an implementation of a magnetic collider for investigating cold collisions between ultracold atomic clouds in different spin states, and we use this to study scattering involving both even- and odd-order partial waves. Our method relies on the axial asymmetry of a double-well magnetic trap to selectively prepare the spin state in each cloud. We measure the energy dependence of sss, ppp, and ddd partial-wave phase shifts in collisions up to $300\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}\mathrm{K}$ between 87Rb^{87}\mathrm{Rb}87Rb atoms in the $5{S}_{1∕2},F=1,{m}_{F}=\ensuremath{-}1$ and 5S1∕2,F=2,mF=15{S}_{1∕2},F=2,{m}_{F}=15S1∕2​,F=2,mF​=1 states.