Abstract
We study the supercounterfluid (SCF) states in the two-component hard-core Bose-Hubbard model on a square lattice, using the quantum Monte Carlo method based on the worm (directed-loop) algorithm. Since the SCF state is a state of a pair condensation characterized by a†b ≠ 0,a=0, and b=0, where a and b are the order parameters of the two components, it is important to study behaviors of the pair-correlation function a ibi†aj†bj. For this purpose, we propose a choice of the worm head for calculating the pair-correlation function. From this pair correlation, we confirm the Kosterlitz-Thouless character of the SCF phase. The simulation efficiency is also improved in the SCF phase.
| Original language | English |
|---|---|
| Article number | 023622 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 83 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2011 Feb 28 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Quantum Monte Carlo method for pairing phenomena : Supercounterfluid of two-species Bose gases in optical lattices. / Ohgoe, Takahiro; Kawashima, Naoki.
In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 83, No. 2, 023622, 28.02.2011.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quantum Monte Carlo method for pairing phenomena
T2 - Supercounterfluid of two-species Bose gases in optical lattices
AU - Ohgoe, Takahiro
AU - Kawashima, Naoki
PY - 2011/2/28
Y1 - 2011/2/28
N2 - We study the supercounterfluid (SCF) states in the two-component hard-core Bose-Hubbard model on a square lattice, using the quantum Monte Carlo method based on the worm (directed-loop) algorithm. Since the SCF state is a state of a pair condensation characterized by a†b ≠ 0,a=0, and b=0, where a and b are the order parameters of the two components, it is important to study behaviors of the pair-correlation function a ibi†aj†bj. For this purpose, we propose a choice of the worm head for calculating the pair-correlation function. From this pair correlation, we confirm the Kosterlitz-Thouless character of the SCF phase. The simulation efficiency is also improved in the SCF phase.
AB - We study the supercounterfluid (SCF) states in the two-component hard-core Bose-Hubbard model on a square lattice, using the quantum Monte Carlo method based on the worm (directed-loop) algorithm. Since the SCF state is a state of a pair condensation characterized by a†b ≠ 0,a=0, and b=0, where a and b are the order parameters of the two components, it is important to study behaviors of the pair-correlation function a ibi†aj†bj. For this purpose, we propose a choice of the worm head for calculating the pair-correlation function. From this pair correlation, we confirm the Kosterlitz-Thouless character of the SCF phase. The simulation efficiency is also improved in the SCF phase.
UR - http://www.scopus.com/inward/record.url?scp=79952132526&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79952132526&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.83.023622
DO - 10.1103/PhysRevA.83.023622
M3 - Article
AN - SCOPUS:79952132526
VL - 83
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 2
M1 - 023622
ER -