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Title

Odd viscosity in the quantum critical region of a holographic Weyl semimetal

AuthorsLandsteiner, Karl ; Liu, Yan; Sun, Ya-Wen
Issue Date2016
PublisherAmerican Physical Society
CitationPhysical Review Letters 117(8): 081604 (2016)
AbstractWe study odd viscosity in a holographic model of a Weyl semimetal. The model is characterized by a quantum phase transition from a topological semimetal to a trivial semimetal state. Since the model is axisymmetric in three spatial dimensions there are two independent odd viscosities. Both odd viscosity coefficients are nonvanishing in the quantum critical region and nonzero only due to the mixed axial gravitational anomaly. It is therefore a novel example in which the mixed axial gravitational anomaly gives rise to a transport coefficient at first order in derivatives at finite temperature. In the quantum critical region, the physics of viscosities as well as conductivities is governed by the quantum critical point.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.117.081604
URIhttp://hdl.handle.net/10261/162125
Identifiersdoi: 10.1103/PhysRevLett.117.081604
e-issn: 1079-7114
issn: 0031-9007
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