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In Situ Thermometry of Fermionic Cold-Atom Quantum Wires
Clément De Daniloff1, Marin Tharrault1, Cédric Enesa1
1Laboratoire Kastler Brossel, ENS-Université PSL, CNRS, Sorbonne Université, Collège de France, 24 rue Lhomond, 75005 Paris, France.
Physical Review Letters
|September 24, 2021
Summary
Researchers explored fermionic cold-atom quantum wires, controlling their properties to study the transition from 1D to 3D. This work enables future studies of strongly interacting 1D Fermi gases.
Area of Science:
- Atomic physics
- Quantum gases
- Condensed matter physics
Background:
- Cold-atom quantum wires offer a platform to study quantum phenomena.
- Understanding the 1D-3D crossover is crucial for quantum many-body physics.
Purpose of the Study:
- To investigate ensembles of fermionic cold-atom quantum wires with single-wire resolution.
- To explore the influence of transverse mode population on quantum wire properties.
- To study the 1D-3D crossover in fermionic systems.
Main Methods:
- Utilizing in situ density profiles to determine temperature and reconstruct potential landscapes.
- Tuning atom number and temperature to control transverse mode occupation.
- Analyzing systems in both 1D and 3D limits.
Main Results:
- Determined temperature and reconstructed potential landscapes in the weakly interacting limit.
- Observed an increase in reduced temperature (T/T_{F}) at nearly constant entropy per particle (S/Nk_{B}) in the 1D limit.
- Demonstrated control over transverse mode occupation.
Conclusions:
- The study provides a method for quantitative analysis of fermionic cold-atom quantum wires.
- Enables future research into equilibrium and transport properties of strongly interacting 1D Fermi gases.
- Highlights the importance of transverse mode control in quantum wire systems.
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