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Superfluid--Insulator Transition in Strongly Disordered One-dimensional Systems (1601.06185v1)
Published 22 Jan 2016 in cond-mat.str-el, cond-mat.dis-nn, and cond-mat.stat-mech
Abstract: We present an asymptotically exact renormalization-group theory of the superfluid--insulator transition in one-dimensional disordered systems, with emphasis on an accurate description of the interplay between the Giamarchi--Schulz (instanton--anti-instanton) and weak-link (scratched-XY) criticalities. Combining the theory with extensive quantum Monte Carlo simulations allows us to shed new light on the ground-state phase diagram of the one-dimensional disordered Bose-Hubbard model at unit filling.
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