175 citations · 235 across the 3 of their papers we have counts for
3 papers
cond-mat.stat-mech2008★ 18 cited
Non-perturbative renormalization-group approach to lattice models
N. Dupuis, K. Sengupta
The non-perturbative renormalization-group approach is extended to lattice models, considering as an example a theory defined on a -dimensional hypercubic lattice. Within…
cond-mat.other2007★ 42 cited
Non-perturbative renormalization-group approach to zero-temperature Bose systems
N. Dupuis, K. Sengupta
We use a non-perturbative renormalization-group technique to study interacting bosons at zero temperature. Our approach reveals the instability of the Bogoliubov fixed point when $…
cond-mat.str-el2004★ 175 cited
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…