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Sökning: L773:2542 4653 > (2017)

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1.
  • Delacretaz, Luca V., et al. (författare)
  • Bad metals from fluctuating density waves
  • 2017
  • Ingår i: SciPost Physics. - : Scipost Foundation. - 2542-4653. ; 3:3
  • Tidskriftsartikel (refereegranskat)abstract
    • Bad metals have a large resistivity without being strongly disordered. In many bad metals the Drude peak moves away from zero frequency as the resistivity becomes large at increasing temperatures. We catalogue the position and width of the ` displaced Drude peak' in the observed optical conductivity of several families of bad metals, showing that omega(peak) similar to Delta omega similar to k(B)T /(h) over bar. This is the same quantum critical timescale that underpins the T-linear dc resistivity of many of these materials. We provide a unified theoretical description of the optical and dc transport properties of bad metals in terms of the hydrodynamics of short range quantum critical fluctuations of incommensurate density wave order. Within hydrodynamics, pinned translational order is essential to obtain the nonzero frequency peak.
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2.
  • Guica, Monica, et al. (författare)
  • On the construction of charged operators inside an eternal black hole
  • 2017
  • Ingår i: SciPost Physics. - : SCIPOST FOUNDATION. - 2542-4653. ; 3:2
  • Tidskriftsartikel (refereegranskat)abstract
    • We revisit the holographic construction of (approximately) local bulk operators inside an eternal AdS black hole in terms of operators in the boundary CFTs. If the bulk operator carries charge, the construction must involve a qualitatively new object: a Wilson line that stretches between the two boundaries of the eternal black hole. This operator - more precisely, its zero mode - cannot be expressed in terms of the boundary currents and only exists in entangled states dual to two-sided geometries, which suggests that it is a state-dependent operator. We determine the action of the Wilson line on the relevant subspaces of the total Hilbert space, and show that it behaves as a local operator from the point of view of either CFT. For the case of three bulk dimensions, we give explicit expressions for the charged bulk field and the Wilson line. Furthermore, we show that when acting on the thermofield double state, the Wilson line may be extracted from a limit of certain standard CFT operator expressions. We also comment on the relationship between the Wilson line and previously discussed mirror operators in the eternal black hole.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
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Karlsson, Anna (1)
Goutéraux, Blaise (1)
Guica, Monica (1)
Delacretaz, Luca V. (1)
Hartnoll, Sean A. (1)
Jafferis, Daniel L. (1)
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Kungliga Tekniska Högskolan (2)
Stockholms universitet (2)
Uppsala universitet (1)
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Engelska (2)
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Naturvetenskap (2)
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2017 (2)Ta bort avgränsningen

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