Journal or Book Title
New Journal of Physics
We reveal a generic mechanism of generating sign-alternating intersite interactions mediated by strongly correlated lattice bosons. The ground-state phase diagram of the two-component hard-core Bose–Hubbard model on a square lattice at half-integer filling factor for each component, obtained by worm algorithm Monte Carlo simulations, is strongly modified by these interactions and features the solid+superfluid (SF) phase for strong asymmetry between the hopping amplitudes. The new phase is a direct consequence of the effective nearest-neighbor repulsion between 'heavy' atoms mediated by the 'light' SF component. Due to their sign-alternating character, mediated interactions lead to a rich variety of yet to be discovered quantum phases.
Söyler, S; Capogrosso-Sansone, B; Prokof'ev, Nikolai; and Svistunov, Boris, "Sign-alternating interaction mediated by strongly correlated lattice bosons" (2009). New Journal of Physics. 1163.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/1163