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Adventures in Holographic Dimer Models
Shamit Kachru, Andreas Karch, Sho Yaida
We abstract the essential features of holographic dimer models, and develop several new applications of these models. First, semi-holographically coupling free band fermions to hol…
Holographic fractional topological insulators in 2+1 and 1+1 dimensions
Andreas Karch, Joseph Maciejko, Tadashi Takayanagi
We give field theory descriptions of the time-reversal invariant quantum spin Hall insulator in 2+1 dimensions and the particle-hole symmetric insulator in 1+1 dimensions in terms…
A Holographic Fractional Topological Insulator
Carlos Hoyos-Badajoz, Kristan Jensen, Andreas Karch
We give a holographic realization of the recently proposed low energy effective action describing a fractional topological insulator. In particular we verify that the surface of th…
Holographic Berezinskii-Kosterlitz-Thouless Transitions
Kristan Jensen, Andreas Karch, Dam T. Son +1
We find the first example of a quantum Berenzinskii-Kosterlitz-Thouless (BKT) phase transition in two spatial dimensions via holography. This transition occurs in the D3/D5 system…
A Holographic Quantum Critical Point at Finite Magnetic Field and Finite Density
Kristan Jensen, Andreas Karch, Ethan G. Thompson
We analyze the phase diagram of N=4 supersymmetric Yang-Mills theory with fundamental matter in the presence of a background magnetic field and nonzero baryon number. We identify a…