Giant Enhancement of the Thermo-Particle Transport Figure of Merit and Breakdown of the Wiedemann-Franz Law in Unitary Fermi Gases
arXiv:1806.09805 · doi:10.1103/PhysRevA.100.043604
Abstract
We theoretically investigate the thermo-particle transport properties of an unitary Fermi gas be- tween two reservoirs connected by a quantum point contact. We find several distinguished properties that are qualitatively different from those of weak or non-interacting gas systems. The particle trans- port figure of merit is drastically enhanced in the unitary regime and it increases as the transmission coefficient increases, exactly opposite to the behavior in the weak or non-interacting gas systems. The Lorentz number violates the Wiedemann-Franz law, demonstrating the breakdown of Fermi liquid. These transport properties are the hallmarks of the unitary Fermi gas and are attributed to the existence of preformed Cooper pairs.
arXiv comment5 pages,4 figures
References in corpus (24)
- Hamiltonian approach to the transport properties of superconducting quantum point contacts
- The BCS-BEC Crossover in a Gas of Fermi Atoms with a Feshbach Resonance
- A thermoelectric heat engine with ultracold atoms
- Universal Spin Transport in a Strongly Interacting Fermi Gas
- Observation of Quantized Conductance in Neutral Matter
- Josephson effect in fermionic superfluids across the BEC-BCS crossover
- Connecting strongly correlated superfluids by a quantum point contact
- Transverse Demagnetization Dynamics of a Unitary Fermi Gas
- Exploring the ferromagnetic behaviour of a repulsive Fermi gas via spin dynamics
- Observing the Drop of Resistance in the Flow of a Superfluid Fermi Gas
- Universal spin dynamics in two-dimensional Fermi gases
- Connecting dissipation and phase slips in a Josephson junction between fermionic superfluids
- Band and correlated insulators of cold fermions in a mesoscopic lattice
- Mapping out spin and particle conductances in a quantum point contact
- Observation of quantum-limited spin transport in strongly interacting two-dimensional Fermi gases
- Breakdown of the Wiedemann-Franz law in a unitary Fermi gas
- A scanning gate microscope for cold atomic gases
- Anomalous conductances in an ultracold quantum wire
- Point-contact tunneling involving low-dimensional spin-triplet superconductors
- Keldysh study of point-contact tunneling between superconductors
- Anomalous Transport in the Superfluid Fluctuation Regime
- Anomalous Conductance of a strongly interacting Fermi Gas through a Quantum Point Contact
- Controlled Transport between Fermi Superfluids Through a Quantum Point Contact
- Fluctuation Effects on the Transport Properties of Unitary Fermi Gases
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- Nonequilibrium noise as a probe of pair-tunneling transport in the BCS--BEC Crossover
- Quantum Chaos of Unitary Fermi Gases in Strong Pairing Fluctuation Region
- Tunneling Hamiltonian analysis of DC Josephson currents in a weakly-interacting Bose-Einstein condensate