Bose-glass Transition and Spin-Wave Localization for 2D Bosons in a Random Potential
Bose-glass Transition and Spin-Wave Localization for 2D Bosons in a Random Potential
A spin-wave approach of the zero temperature superfluid-insulator transition for two-dimensional hard-core bosons in a random potential μ=±W is developed. While at the classical level there is no intervening phase between the Bose-condensed superfluid (SF) and the gapped disordered insulator, the introduction of quantum fluctuations leads to a much richer …