Spectral Functions and Exact Solutions of a Quantum Dimer Model for Topological Metals

I will present numerical results for the single electron spectral function of a quantum dimer model introduced in Ref. [1], which captures several properties of the pseudogap state in underdoped cuprates. This model features a metallic ground state with topological order, a so-called fractionalized Fermi liquid. Our results show a well developed pseudogap in the antinodal region of the Brillouin zone, with an angular dependence in accordance with photoemission experiments. Besides these numerical results I will also discuss an interesting exact solution of this model, which indicates that the ground state is indeed a fractionalized Fermi liquid.

[1] M. Punk, A. Allais, and S. Sachdev, Proc. Natl. Acad. Sci. 112, 9552 (2015).