175 citations · 410 across the 4 of their papers we have counts for
5 papers · 1 filter
Mott insulator to superfluid transition in the Bose-Hubbard model: a strong-coupling approach
K. Sengupta, N. Dupuis
We present a strong-coupling expansion of the Bose-Hubbard model which describes both the superfluid and the Mott phases of ultracold bosonic atoms in an optical lattice. By perfor…
Competing orders II: the doped quantum dimer model
Leon Balents, Lorenz Bartosch, Anton Burkov +2
We study the phases of doped spin S=1/2 quantum antiferromagnets on the square lattice, as they evolve from paramagnetic Mott insulators with valence bond solid (VBS) order at zero…
Putting competing orders in their place near the Mott transition
Leon Balents, Lorenz Bartosch, Anton Burkov +2
We describe the localization transition of superfluids on two-dimensional lattices into commensurate Mott insulators with average particle density p/q (p, q relatively prime intege…
Quench dynamics across quantum critical points
K. Sengupta, Stephen Powell, Subir Sachdev
We study the quantum dynamics of a number of model systems as their coupling constants are changed rapidly across a quantum critical point. The primary motivation is provided by th…
Competing density-wave orders in a one-dimensional hard-boson model
Paul Fendley, K. Sengupta, Subir Sachdev
We describe the zero-temperature phase diagram of a model of bosons, occupying sites of a linear chain, which obey a hard-exclusion constraint: any two nearest-neighbor sites may h…