Scientific Results

Effects of long-range hopping in the Bose-Hubbard model

Year: 2019

Authors: Ferraretto M., Salasnich L.

Autors Affiliation: Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Via Marzolo 8, I-35131 Padua, Italy; CNR, INO, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy

Abstract: We investigate the effects of an extended Bose-Hubbard model with a long-range hopping term on the Mott insulator-superfluid quantum phase transition. We consider the effects of a power-law decaying hopping term, and we show that the Mott phase is shrunk in the parameters’ space. We provide an exact solution for one-dimensional lattices and also two reliable approximations for higher dimensions. Finally, we extend these results to a more realistic situation in which long-range hopping is made by a combination of power-law and screening terms, studying the main effects on the Mott lobes.

Journal/Review: PHYSICAL REVIEW A

Volume: 99 (1)      Pages from: 013618-1  to: 013618-5

KeyWords: EINSTEIN CONDENSATION; MOTT-INSULATOR; GAS; TRANSITION; SUPERFLUID
DOI: 10.1103/PhysRevA.99.013618

Citations: 1
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

gdpr-image
This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more