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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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Quench-induced Floquet topological p-wave superfluids
Matthew S Foster1, Victor Gurarie2, Maxim Dzero3
1Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.
Physical Review Letters
|August 30, 2014
Summary
Researchers created a novel topological Floquet superfluid in ultracold atomic gases by rapidly tuning them near a p-wave Feshbach resonance. This self-driven system exhibits Majorana edge modes, overcoming experimental instability issues.
Area of Science:
- Atomic physics
- Condensed matter physics
- Topological quantum matter
Background:
- Ultracold atomic gases are crucial for simulating quantum phenomena.
- Two-dimensional systems near p-wave Feshbach resonances were predicted to show topological superfluidity.
- Experimental instabilities have hindered the realization of these topological states.
Purpose of the Study:
- To investigate the possibility of inducing topological superfluidity in a stable manner.
- To explore a novel type of topological Floquet system.
- To overcome the experimental limitations of previous approaches.
Main Methods:
- Utilizing ultracold atomic gases in two dimensions.
- Rapidly quenching the system parameters towards a p-wave Feshbach resonance.
- Observing the system dynamics before the onset of instability.
Main Results:
- Successfully induced a topological Floquet superfluid.
- The system exhibits Majorana edge modes, characteristic of topological phases.
- The observed system is a self-driven Floquet system, not externally modulated.
Conclusions:
- A stable route to realizing topological superfluids with Majorana modes has been demonstrated.
- This work introduces a new class of non-equilibrium topological matter.
- The self-generated periodic modulation offers a unique platform for studying topological phenomena.
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