Vanishing bulk viscosities and conformal invariance of the unitary fermi gas

Vanishing bulk viscosities and conformal invariance of the unitary fermi gas

By requiring general-coordinate and conformal invariance of the hydrodynamic equations, we show that the unitary Fermi gas has zero bulk viscosity, zeta=0, in the normal phase. In the superfluid phase, two of the bulk viscosities have to vanish, zeta1=zeta2=0, while the third one zeta3 is allowed to...

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Veröffentlicht in:Physical review letters 2007-01, Vol.98 (2), p.020604-020604, Article 020604
1. Verfasser: Son, D T
Format: Artikel
Sprache:eng
Schlagworte:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONFORMAL INVARIANCE
COORDINATES
EQUATIONS
FERMI GAS
SUPERFLUIDITY
VISCOSITY
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Zusammenfassung:By requiring general-coordinate and conformal invariance of the hydrodynamic equations, we show that the unitary Fermi gas has zero bulk viscosity, zeta=0, in the normal phase. In the superfluid phase, two of the bulk viscosities have to vanish, zeta1=zeta2=0, while the third one zeta3 is allowed to be nonzero.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.98.020604