Regular Article – Statistical and Nonlinear Physics
Bose–Einstein condensation in one-dimensional systems with short-range correlated disordered on-site potentials
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, 210023, Nanjing, People’s Republic of China
2 Jiangsu Key Laboratory for Numerical Simulation of Large Scale Complex Systems, Nanjing Normal University, 210023, Nanjing, People’s Republic of China
3 Nanjing Normal University Taizhou College, 225300, Taizhou, People’s Republic of China
Accepted: 10 August 2022
Published online: 26 August 2022
We study Bose–Einstein condensation (BEC) in one-dimensional tight-binding systems with two kinds of short-range correlated disordered on-site energy sequences (OSESs). One is the chaotic sequence generated by the modified Bernoulli map, the other is the random-dimer sequence. For these two kinds of short-range correlated systems, we consider binary and non-binary versions of sequences. It is found that BEC can occur in these systems at finite temperature and their transition temperatures () increase with the potential strength w. Moreover, the of the systems with non-binary OSESs are greater than those of the binary ones. And the increases with the correlation parameter B () for the chaotic system. Compared with the uncorrelated disordered system, the introduction of correlation decreases the for the chaotic binary system, while for the non-binary system that increases the in the region and decreases it in the remaining short-range correlated regions. The results for the random-dimer system are similar to those for the chaotic system in the region.
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