Regensburg 2016 – wissenschaftliches Programm
DY 27.7: Poster
Dienstag, 8. März 2016, 18:15–21:00, Poster C
Using entanglement to discern phases in the disordered one-dimensional Bose-Hubbard model — Andrew M. Goldsborough1,2 and •Rudolf A. Römer2 — 1JARA Institute for Quantum Information, RWTH Aachen University - D-52056 Aachen, Germany — 2University of Warwick, Coventry CV4 7AL, UK
We perform a matrix-product-state based density matrix renormalisation group analysis of the phases for the disordered one-dimensional Bose-Hubbard model. For particle densities N/L = 1, 1/2 and 2 we show that it is possible to obtain a full phase diagram using only the entanglement properties, which come for free when performing an update. We confirm the presence of Mott insulating, superfluid and Bose glass phases when N/L = 1 and 1/2 (without the Mott insulator) as found in previous studies. For the N/L = 2 system we find a double-lobed superfluid phase with possible re-entrance.