366 citations · 1.1k across the 11 of their papers we have counts for
10 papers
Superfluid-insulator transitions of two-species Bosons in an optical lattice
A. Isacsson, Min-Chul Cha, K. Sengupta +1
We consider a realization of the two-species bosonic Hubbard model with variable interspecies interaction and hopping strength. We analyze the superfluid-insulator (SI) transition…
Competing Orders and non-Landau-Ginzburg-Wilson Criticality in (Bose) Mott transitions
Leon Balents, Lorenz Bartosch, Anton Burkov +2
This paper reviews a recent non-Landau-Ginzburg-Wilson (LGW) approach to superfluid to Mott insulator transitions in two dimensional bosonic lattice systems, using a dual vortex fi…
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…
Mott insulator to superfluid transition of ultracold bosons in an optical lattice near a Feshbach resonance
K. Sengupta, N. Dupuis
We study the phase diagram of ultracold bosons in an optical lattice near a Feshbach resonance. Depending on the boson density, the strength of the optical lattice potential and th…
Fractional ac Josephson effect in p- and d-wave superconductors
Hyok-Jon Kwon, K. Sengupta, Victor M. Yakovenko
For certain orientations of Josephson junctions between two p_x-wave or two d-wave superconductors, the subgap Andreev bound states produce a 4pi-periodic relation between the Jose…
Mott insulators in strong electric fields
Subir Sachdev, K. Sengupta, S. M. Girvin
Recent experiments on ultracold atomic gases in an optical lattice potential have produced a Mott insulating state of Rb atoms. This state is stable to a small applied potential gr…