Punk, MatthiasAllais, AndreaSachdev, Subir2016-07-222015Punk, Matthias, Andrea Allais, and Subir Sachdev. 2015. “Quantum Dimer Model for the Pseudogap Metal.” Proc Natl Acad Sci USA 112 (31) (July 20): 9552–9557. doi:10.1073/pnas.1512206112.0027-8424http://nrs.harvard.edu/urn-3:HUL.InstRepos:27729291We propose a quantum dimer model for the metallic state of the hole-doped cuprates at low hole density, p. The Hilbert space is spanned by spinless, neutral, bosonic dimers and spin S=1/2S=1/2, charge +e+e fermionic dimers. The model realizes a “fractionalized Fermi liquid” with no symmetry breaking and small hole pocket Fermi surfaces enclosing a total area determined by p. Exact diagonalization, on lattices of sizes up to 8×88×8, shows anisotropic quasiparticle residue around the pocket Fermi surfaces. We discuss the relationship to experiments.en-USspin liquidFermi liquidsuperconductivitydimer modelJournal Article2016-07-2210.1073/pnas.1512206112