Abstract
We study spin-1 bosons in an optical lattice under a magnetic field with the Gutzwiller approximation for the Bose-Hubbard model. Phase boundary curves between superfluids and Mott insulators depend continuously on the magnetic field, and this provides better results than those obtained with the perturbative mean-field approximation. The phase boundary curve as a function of magnetic field has a sharp cusp structure under certain circumstances. In superfluid phases, both the spin magnetizations and fluctuations in the total number of bosons show strong magnetic field dependence, which is related to the fact that both first-and second-order transitions appear on the phase boundary curve according to the magnetic field.
| Original language | English |
|---|---|
| Pages (from-to) | 54-59 |
| Number of pages | 6 |
| Journal | Laser Physics |
| Volume | 17 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2007 Jan |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy (miscellaneous)
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Gutzwiller study of spin-1 bosons in an optical lattice under a magnetic field. / Kimura, T.; Tsuchiya, S.; Yamashita, M.; Kurihara, S.
In: Laser Physics, Vol. 17, No. 1, 01.2007, p. 54-59.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gutzwiller study of spin-1 bosons in an optical lattice under a magnetic field
AU - Kimura, T.
AU - Tsuchiya, S.
AU - Yamashita, M.
AU - Kurihara, S.
PY - 2007/1
Y1 - 2007/1
N2 - We study spin-1 bosons in an optical lattice under a magnetic field with the Gutzwiller approximation for the Bose-Hubbard model. Phase boundary curves between superfluids and Mott insulators depend continuously on the magnetic field, and this provides better results than those obtained with the perturbative mean-field approximation. The phase boundary curve as a function of magnetic field has a sharp cusp structure under certain circumstances. In superfluid phases, both the spin magnetizations and fluctuations in the total number of bosons show strong magnetic field dependence, which is related to the fact that both first-and second-order transitions appear on the phase boundary curve according to the magnetic field.
AB - We study spin-1 bosons in an optical lattice under a magnetic field with the Gutzwiller approximation for the Bose-Hubbard model. Phase boundary curves between superfluids and Mott insulators depend continuously on the magnetic field, and this provides better results than those obtained with the perturbative mean-field approximation. The phase boundary curve as a function of magnetic field has a sharp cusp structure under certain circumstances. In superfluid phases, both the spin magnetizations and fluctuations in the total number of bosons show strong magnetic field dependence, which is related to the fact that both first-and second-order transitions appear on the phase boundary curve according to the magnetic field.
UR - http://www.scopus.com/inward/record.url?scp=33846253165&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846253165&partnerID=8YFLogxK
U2 - 10.1134/S1054660X07010112
DO - 10.1134/S1054660X07010112
M3 - Article
AN - SCOPUS:33846253165
VL - 17
SP - 54
EP - 59
JO - Laser Physics
JF - Laser Physics
SN - 1054-660X
IS - 1
ER -