Publication Date
2007
Journal or Book Title
Physics Review A
Abstract
We have performed quantum Monte Carlo simulations to investigate the superfluid behavior of one- and two-dimensional interfaces separating checkerboard solid domains. The system is described by the hard-core Bose-Hubbard Hamiltonian with nearest-neighbor interaction. In accordance with Burovski et al. [Phys. Rev. Lett. 94, 165301 (2005)] we find that (i) the interface remains superfluid in a wide range of interaction strength before it undergoes a superfluid-insulator transition; (ii) in one dimension, the transition is of the Kosterlitz-Thouless type and is accompanied by the roughening transition, driven by proliferation of charge-1∕2 quasiparticles; (iii) in two dimensions, the transition belongs to the three-dimensional U(1) universality class and the interface remains smooth. Similar phenomena are expected for domain walls in quantum antiferromagnets.
Volume
76
Issue
4
Recommended Citation
Söyler, S; Capogrosso-Sansone; Prokof'ev, Nikolai; and Svistunov, Boris, "Superfluid-insulator and roughening transitions in domain walls" (2007). Physics Review A. 1156.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/1156
Comments
This is the pre-published version harvested from ArXiv. The published version is located at http://pra.aps.org/abstract/PRA/v76/i4/e043628