|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
High-order strong-coupling expansion for the Bose-Hubbard model | | Tao Wang
; Xue-Feng Zhang
; Chun-Feng Hou
; Sebastian Eggert
; Axel Pelster
; | | Date: |
5 Jan 2018 | | Abstract: | Based on the process-chain method, we work out in detail a high-order
strong-coupling expansion (HSCE) algorithm for determining the quantum phase
boundary between the Mott insulator and the superfluid phase of the
Bose-Hubbard model in different dimensions. A comparison with quantum
Monte-Carlo results reveals the high efficiency and accuracy of the HSCE. With
a symbolized evaluation of the algorithm we obtain an analytic expression for
the strong-coupling boundary for different fillings up to eighth order. A
subsequent Pad’e approximation then yields a scaling function, which rescales
lobes with different fillings to one lobe. As a further crosscheck, we perform
a hopping expansion of the phase boundaries obtained from the effective
potential Landau theory (EPLT) and find that the respective expansion
coefficients coincide with those of HSCE. | | Source: | arXiv, 1801.1862 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER