Quantum critical transport in the unitary Fermi gas
The thermodynamic and transport properties of the unitary Fermi gas at finite temperature T are governed by a quantum critical point at T=0 and zero density. We compute the universal shear viscosity to entropy ratio \eta/s in the high-temperature quantum critical regime T>>|\mu| and find that...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article (Journal) Chapter/Article |
| Language: | English |
| Published: |
2012
|
| In: |
Arxiv
|
| Online Access: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1204.1980
|
| Author Notes: | Tilman Enss |
| Summary: | The thermodynamic and transport properties of the unitary Fermi gas at finite temperature T are governed by a quantum critical point at T=0 and zero density. We compute the universal shear viscosity to entropy ratio \eta/s in the high-temperature quantum critical regime T>>|\mu| and find that this strongly coupled quantum fluid comes close to perfect fluidity \eta/s=\hbar/(4\pi k_B). Using a controlled large-N expansion we show that already at the first non-trivial order the equation of state and the Tan contact density C agree well with the most recent experimental measurements and theoretical Luttinger-Ward and Bold Diagrammatic Monte Carlo calculations. |
|---|---|
| Item Description: | Gesehen am 23.11.2017 |
| Physical Description: | Online Resource |