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Critical point of the one-dimensional boson Hubbard model
- Issue Date
- Dec-2004
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- boson Hubbard model; superfluid; Mott insulator
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.45, no.6, pp 1553 - 1556
- Pages
- 4
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 45
- Number
- 6
- Start Page
- 1553
- End Page
- 1556
- ISSN
- 0374-4884
1976-8524
- Abstract
- We study the one-dimensional boson Hubbard model through the exact diagonalization of the Hamiltonian for the periodic boundary condition. Using the finite-size scaling of the energy increase due to a twist imposed on the boundaries, we can successfully determine, even in small systems, the critical value of the tuning parameter (t/U)(c) = 0.283 +/- 0.005 for the commensurate density with one boson per site, a distinct improvement in accuracy compared to previous studies.
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