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Updated: Apr 27, 2026
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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
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Photon-assisted confinement-induced resonances for ultracold atoms
Vicente Leyton1, Maryam Roghani1, Vittorio Peano2
1I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany.
Physical Review Letters
|June 28, 2014
Summary
We explore ultracold-atom gas scattering in a modulated 1D trap. The study reveals photon-assisted scattering channels and controllable 1D scattering length via external driving.
Area of Science:
- Quantum physics
- Ultracold atomic gases
- Low-dimensional systems
Background:
- Two-particle scattering is fundamental in quantum mechanics.
- Ultracold atoms in optical traps allow precise control over quantum phenomena.
- Quasi-one-dimensional systems exhibit unique quantum behaviors.
Purpose of the Study:
- To investigate two-particle s-wave scattering in a periodically modulated quasi-one-dimensional trapping potential.
- To analyze the role of Fermi's pseudopotential in atomic interactions.
- To explore the impact of modulated confinement on scattering properties.
Main Methods:
- Solving the time-dependent Floquet-Schrödinger equation.
- Applying Fermi's pseudopotential for atomic interactions.
- Utilizing Bethe-Peierls boundary conditions for scattering solutions.
- Analyzing decoupled center-of-mass and relative motion in modulated harmonic confinement.
Main Results:
- Exact solutions for scattering are obtained for modulated isotropic transverse harmonic confinement.
- Photon-assisted resonant scattering channels are identified.
- A universal low-energy scattering solution is derived.
- The effective one-dimensional scattering length is shown to be controllable by external driving.
Conclusions:
- Periodic modulation of confinement offers a new pathway to control ultracold atom scattering.
- Photon-assisted scattering provides tunable interactions in low dimensions.
- The findings are relevant for quantum simulation and manipulation of ultracold atomic gases.
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