Details
| Original language | English |
|---|---|
| Article number | 023615 |
| Number of pages | 8 |
| Journal | Physical Review A |
| Volume | 98 |
| Issue number | 2 |
| Publication status | Published - Aug 2018 |
Abstract
A first-order type phase transition between Mott lobes has been reported in Phys. Rev. Lett. 109, 135302 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.135302 for a two-dimensional Bose-Hubbard model in the presence of an attractive three-body interaction. We revisit the scenario in systems of ultracold bosons both in one- and two-dimensional lattices using the density matrix renormalization group method and the self-consistent cluster mean-field theory approach, respectively. We show that an unconventional pairing of particles occurs due to the competing repulsive two-body and attractive three-body interactions. This leads to a pair superfluid phase sandwiched between the Mott insulator lobes corresponding to densities density one and three in the strongly interacting regime. This is in contrast to the direct first-order jump as predicted before. Interestingly, the Mott to pair superfluid phase transitions are found to be continuous in nature. We also show that the pair superfluid phase is robust with respect to the ratio between the two- and three-body interaction strengths. In the end, we establish a connection between the Bose-Hubbard model presented in Phys. Rev. Lett. 109, 135302 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.135302 with a more general Bose-Hubbard model and analyze the fate of the pair superfluid phase in the presence of an external trapping potential.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 98, No. 2, 023615, 08.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Anomalous pairing of bosons: Effect of multibody interactions in an optical lattice
AU - Singh, Manpreet
AU - Greschner, Sebastian
AU - Mishra, Tapan
N1 - Publisher Copyright: © 2018 American Physical Society.
PY - 2018/8
Y1 - 2018/8
N2 - A first-order type phase transition between Mott lobes has been reported in Phys. Rev. Lett. 109, 135302 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.135302 for a two-dimensional Bose-Hubbard model in the presence of an attractive three-body interaction. We revisit the scenario in systems of ultracold bosons both in one- and two-dimensional lattices using the density matrix renormalization group method and the self-consistent cluster mean-field theory approach, respectively. We show that an unconventional pairing of particles occurs due to the competing repulsive two-body and attractive three-body interactions. This leads to a pair superfluid phase sandwiched between the Mott insulator lobes corresponding to densities density one and three in the strongly interacting regime. This is in contrast to the direct first-order jump as predicted before. Interestingly, the Mott to pair superfluid phase transitions are found to be continuous in nature. We also show that the pair superfluid phase is robust with respect to the ratio between the two- and three-body interaction strengths. In the end, we establish a connection between the Bose-Hubbard model presented in Phys. Rev. Lett. 109, 135302 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.135302 with a more general Bose-Hubbard model and analyze the fate of the pair superfluid phase in the presence of an external trapping potential.
AB - A first-order type phase transition between Mott lobes has been reported in Phys. Rev. Lett. 109, 135302 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.135302 for a two-dimensional Bose-Hubbard model in the presence of an attractive three-body interaction. We revisit the scenario in systems of ultracold bosons both in one- and two-dimensional lattices using the density matrix renormalization group method and the self-consistent cluster mean-field theory approach, respectively. We show that an unconventional pairing of particles occurs due to the competing repulsive two-body and attractive three-body interactions. This leads to a pair superfluid phase sandwiched between the Mott insulator lobes corresponding to densities density one and three in the strongly interacting regime. This is in contrast to the direct first-order jump as predicted before. Interestingly, the Mott to pair superfluid phase transitions are found to be continuous in nature. We also show that the pair superfluid phase is robust with respect to the ratio between the two- and three-body interaction strengths. In the end, we establish a connection between the Bose-Hubbard model presented in Phys. Rev. Lett. 109, 135302 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.135302 with a more general Bose-Hubbard model and analyze the fate of the pair superfluid phase in the presence of an external trapping potential.
UR - http://www.scopus.com/inward/record.url?scp=85051518189&partnerID=8YFLogxK
U2 - 10.48550/arXiv.1710.07316
DO - 10.48550/arXiv.1710.07316
M3 - Article
AN - SCOPUS:85051518189
VL - 98
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 2
M1 - 023615
ER -