Fragmentation and the Bose-glass phase transition of the disordered one-dimensional Bose gasFragmentation and the Bose-glass phase transition of the disordered one-dimensional Bose gas
Faculty of Sciences. Physics

Theory of quantum systems and complex systems

article

2011Lancaster, Pa, 2011

Physics

Physical review : A : atomic, molecular and optical physics. - Lancaster, Pa, 1990 - 2015

83(2011):3, 5 p.

1094-1622

1050-2947

033626

E-only publicatie

English (eng)

We investigate the superfluid-insulator quantum phase transition in a disordered one-dimensional Bose gas in the mean-field limit by studying the probability distribution of the density. The superfluid phase is characterized by a vanishing probability to have zero density, whereas a nonzero probability marks the insulator phase. This relation is derived analytically and confirmed by a numerical study. This fragmentation criterion is particularly suited for detecting the phase transition in experiments. When a harmonic trap is included, the transition to the insulating phase can be extracted from the statistics of the local density distribution.

https://repository.uantwerpen.be/docman/irua/7b7b6e/07564632.pdf