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Published on: August 2, 2019
Total current blockade in an ultracold dipolar quantum wire.
L H Kristinsdóttir1, O Karlström, J Bjerlin
1Mathematical Physics and Nanometer Structure Consortium, nmC@LU, Lund University, Box 118, 22100 Lund, Sweden.
Physical Review Letters
|March 12, 2013
Summary
Ultracold quantum gases in a quantum wire can exhibit a current blockade. Attractive interactions completely suppress current flow at low bias, a novel quantum transport phenomenon.
Area of Science:
- Quantum physics
- Mesoscopic systems
- Cold atom systems
Background:
- Cold-atom systems present unique opportunities for developing novel mesoscopic quantum systems.
- These systems offer properties distinct from traditional semiconductor nanostructures.
Purpose of the Study:
- Investigate the quantum-gas analogue of a quantum wire.
- Identify new quantum transport phenomena in such systems.
Main Methods:
- Theoretical investigation of quantum transport in a quantum wire analogue.
- Utilizing ultracold quantum gases with dipolar interactions.
Main Results:
- Discovery of a novel quantum transport scenario.
- Demonstration of complete current suppression in the low-bias range due to attractive interactions.
- Observation of a total current blockade effect.
Conclusions:
- Attractive interactions in ultracold quantum gases can lead to a complete current blockade.
- This finding reveals a new mechanism for controlling quantum transport in mesoscopic systems.
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