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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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Synthetic partial waves in ultracold atomic collisions.

R A Williams1, L J LeBlanc, K Jiménez-García

  • 1Joint Quantum Institute (JQI), National Institute of Standards and Technology (NIST), and University of Maryland, Gaithersburg, MD 20899, USA.

Science (New York, N.Y.)
|December 14, 2011
PubMed
Summary
This summary is machine-generated.

Researchers modified ultracold atom interactions using light. This technique creates long-range interactions, enabling quantum simulations of exotic systems like Majorana fermions.

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Area of Science:

  • Atomic physics
  • Quantum simulation
  • Condensed matter physics

Background:

  • Particle interactions are environment-dependent.
  • Ultracold atoms provide a controllable system for studying quantum phenomena.
  • Standard interactions in ultracold atoms are typically short-range.

Purpose of the Study:

  • To demonstrate a technique for modifying interactions between ultracold atoms.
  • To create an effective interaction of vastly increased range.
  • To enable quantum simulation of exotic systems.

Main Methods:

  • Dressing bare atomic states with light.
  • Colliding two optically dressed neutral atomic Bose-Einstein condensates.
  • Analyzing scattering distributions for angular momentum contributions.

Main Results:

  • Achieved effective interactions of vastly increased range.
  • Observed scattering of finite relative angular momentum states.
  • Detected d- and g-wave contributions in scattered atoms, deviating from the usual s-wave distribution.

Conclusions:

  • Light-induced atomic interactions offer a novel control mechanism.
  • This technique expands the scope of quantum simulation possibilities.
  • Potential applications include simulating systems with Majorana fermions.