  We present a slave-particle mean-field study of the mixed boson+fermion
quantum dimer model introduced by Punk, Allais, and Sachdev [PNAS 112, 9552
(2015)] to describe the physics of the pseudogap phase in cuprate
superconductors. Our analysis naturally leads to four charge e fermion pockets
whose total area is equal to the hole doping p, for a range of parameters
consistent with the t-J model for high temperature superconductivity. Here we
find that the dimers are unstable to d-wave superconductivity at low
temperatures. The region of the phase diagram with d-wave rather than s-wave
superconductivity matches well with the appearance of the four fermion pockets.
In the superconducting regime, the dispersion contains eight Dirac cones along
the diagonals of the Brillouin zone.
