10 citations · 10 across the 3 of their papers we have counts for
4 papers · 1 filter
Finite-temperature phase transitions in a two-dimensional boson Hubbard model
Min-Chul Cha, Ji-Woo Lee
We study finite-temperature phase transitions in a two-dimensional boson Hubbard model with zero-point quantum fluctuations via Monte Carlo simulations of quantum rotor model, and…
The quasi-particle gap in a disordered boson Hubbard model in two dimensions
Ji-Woo Lee, Min-Chul Cha
We investigate the behavior of the quasi-particle energy gap near quantum phase transitions in a two-dimensional disordered boson Hubbard model at a commensurate filling. Via Monte…
Correlations at a quantum phase transition in interacting Bose systems
Min-Chul Cha
We have investigated the correlation functions of interacting bosons at the generic superfluid-insulator transition, a prototypical quantum phase transition, in two dimensions in t…
Separation of two regimes in a disordered boson Hubbard Model
Ji-Woo Lee, Min-Chul Cha
We study the insulator-to-superfluid transition in a two-dimensional disordered boson Hubbard model at zero temperature for intermediate strength of disorder at commensurate densit…